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CHIPS
The Full Lesson Plan
Electric Circuits · 30 sessions · grades 3-4
🔌 The Virtual Lab
CHIPS · Hands-on technology enrichment
Electric Circuits
30 hands-on sessions: from your first circuit to a system you invented yourselves
Complete instructor guide
30
Sessions
45
Minutes per session
3-4
Grades
4-5
Per team
30
Per class
Snap Circuits kit · 403 experiments · ages 8+
Internal document for CHIPS instructors · Electric Circuits · Version 1.0 · August 2026
inteRFace R&D
Electric Circuits · CHIPSCHIPS01
01 · The Vision
Why Circuits, and Why This Age

In grades 3-4, kids still believe electricity is magic. This course takes the magic and breaks it down into something you can hold in your hand - a circuit they built, that lights up when they want it to and goes off when they decide. No code, no screens: blocks that snap together with a click, wires, and one question that comes back every session - “Why does it work?”

The CHIPS Promise

  • Every session ends with something that works - a lamp, a sound, motion, or a whole system.
  • Every concept comes in through the body and real materials first: a relay race, a balloon, a lemon - and only then the word.
  • A mistake isn’t a failure, it’s a puzzle. Every session includes troubleshooting practice.
  • Kids leave with a sentence they can say at home: “I know how it works.”

Classroom Setup

  • Fixed teams of 4-5 - one kit per team, 6-7 kits per class plus an instructor kit.
  • Roles rotate every session: Builder · Tester · Navigator · Presenter · Kit Manager.
  • The instructor projects and demonstrates on the screen, walks around the tables - and never touches the circuits.
  • A Stage Moment every session: every team demos, even when the result is partial.
“A kid who lit a lamp in a circuit they built themselves never looks at a wall switch the same way again. That’s exactly the goal.”

The Chips System

The classroom currency is the chip - a team point in the chart on the board:

  • A circuit that works on the first test - 1 · A correct prediction before an experiment - 1
  • Finding a fault on your own - 2 · Real help to another team - 2
  • The session’s Chips Challenge - 2 · Presenting at the Stage Moment - 1

What Chips Are Worth

  • First pick of Final Project in session 27.
  • The “Engineer on Duty” role - helps the instructor with the next demo.
  • A featured spot in the exhibition at the finale night.
  • Golden rule: chips are given for process - and never taken back.
Electric Circuits · Instructor GuideCHIPS02
02 · Teaching Method
Guess, Build, Discover

At this age, a long explanation loses the class within 90 seconds. So every session follows a fixed four-step path where hands work before words arrive, and the concept comes in after the kids have already seen it happen.

The Four Steps of Every Session

  • 1 · Guess - a question everyone can answer, with no right answer in advance. “What will happen if…?”
  • 2 · Build - the team assembles from the projected Build Order, block by block.
  • 3 · Discover - compare the guess to what really happened. This is where the new word comes in.
  • 4 · Play - a game or challenge that reinforces what was learned and ends on high energy.

The Anatomy of 45 Minutes

TimeWhat Happens
00-06Opening Hook - a surprising question or demo from real life.
06-13Projected Demo - the instructor builds on screen, one new concept.
13-35Building in Teams - the heart of the session. The instructor circulates and asks questions.
35-42Stage Moment - each team demos for 30-60 seconds.
42-45Wrap-up and Cleanup - a teaser sentence + teardown by the kit map.

“Routine Breaker” - why every session has an experiment

The same kit for 30 weeks in a row bores any kid. So every session has one experiment with real-world materials: a lemon, a balloon, a nail, salt water, aluminum foil. The experiment takes 5-8 minutes, costs almost nothing - and connects the blocks on the table to the real electricity in everyday life. It’s also the moment kids tell their families about.

Standard Classroom Equipment

  • Projector + instructor computer · 6-7 kits + an instructor kit.
  • “Routine Breaker” box: balloons, aluminum foil, clothespins, large nails, copper wire, salt, lemons (by session).
  • Stock of AA batteries - the #1 cause of faults. Replace every 6-8 sessions.
  • Cardboard, scissors, glue - for boxes and models.
The non-negotiable rule: the instructor never builds in place of the kid. Point, ask “What’s missing here?” - and let their own fingers do the click.
Electric Circuits · Instructor GuideCHIPS03
03 · Facilitation
The Ten Facilitation Principles

1 · The Kid’s Hands

Even if it takes three minutes and the answer is obvious to you, the block gets pressed by their finger. Success achieved by an adult’s hand doesn’t stick.

2 · One Concept per Session

45 minutes = one new word. Everything else is practice. If you’re unsure whether to add an explanation, don’t.

3 · Predict Before You Test

Always ask “What will happen?” before connecting. A wrong guess that gets tested is worth more than a correct explanation they only heard.

4 · A Bug Is a Puzzle

When something doesn’t work, say out loud “Great, we’ve got a puzzle!” and model it: look → press again → swap one part.

5 · Real Roles

In a team of 5, every kid has a role, and roles rotate every session. That way no kid just watches, and no one takes over.

6 · Talk in Questions

“What happens if we pull out this wire?” beats “It’s not connected.” They’ll find it - and it will stick.

7 · A Stage Moment for Everyone

Every team presents every session, even with a partial result. Always applaud, no exceptions.

8 · Safety Without Scaring

The kit is completely safe. Respect for the electricity in the wall is built through clear rules - not scary stories.

9 · Cleanup Is Part of the Lesson

3 minutes of teardown at the end of every session, each part in its own slot. A messy kit steals 10 minutes from the next session.

10 · Big Class, One Signal

An agreed hand signal = everyone goes quiet and looks at the screen. Practice it in session 1 and use it for all 30 sessions.

The end-of-session test: every kid can say in one sentence what they built and how it works. If not, we slowed down too late.
Electric Circuits · Instructor GuideCHIPS04
04 · Safety and Troubleshooting
Before You Start

The kit runs on batteries only - 3 to 6 volts. There is no danger in it: you can touch any part, and even close a circuit with your fingers (which is exactly what you do in session 14). The safety we teach is about the electricity outside the kit - and that’s a lesson for life.

Totally Fine

The kit runs on 3-6V from batteries. You can touch any part, hold the wires, and even close a circuit with your fingers - you feel nothing and there is no danger.

Strictly Forbidden

Connecting anything from the kit to a wall outlet · putting objects into an outlet · using the kit near water · opening batteries or heating them.

Working Rules

The motor’s propeller always points up · disconnect the battery before taking things apart · keep water and drinks away from the table · a hot part = disconnect it and tell the instructor.

Magnets

Magnets are small and easy to swallow - count them at the start and end of the session, and keep them away from cards, watches, and computers.

Troubleshooting Table - the Quick Fix for Every Session

Nothing worksCheck the batteries first! Then: is every block pressed until it clicks? Lift and re-seat them one by one.
The lamp won’t lightSwap in a lamp from another kit. If it works, the old one is burned out. If not, the fault is in the circuit.
The LED won’t light1) Is there a resistor? 2) Is it facing the right way? Rotate it 180° and try again.
Everything is hot and the battery is drainingA short circuit - a wire connects + to − directly. Disconnect immediately and look for it.
The motor won’t spinIs the propeller stuck? Remove it and check. Weak batteries can power a lamp but not a motor.
The sensor doesn’t respondFlickering fluorescent light confuses it. Move next to a window or use a flashlight.
The alarm won’t stopDisconnect the battery. Then: is the magnet too close? Is the sensor accidentally shaded?
The capacitor doesn’t “remember”Polarity! The side marked + must face the battery’s + side.
Before every session, 60 seconds: check that the batteries are fresh in all 6-7 kits. More than half of the “mysterious faults” in the course are a weak battery.
Electric Circuits · Instructor GuideCHIPS05
05 · Know Your Kit
Parts Map · Part A

This is the page you open when you pick up an unfamiliar part - and it’s also the storage order at the end of every session. The kit has about 60 blocks; the ones shown here are the ones the course uses, in the order they come in.

The Base - on the table every session
Base Board
Base Board Base Grid
The grid everything snaps onto. Every block clicks and locks into place.
Session 1
+ − 3V
3V Battery Holder Battery Holder
Two AA batteries. Watch the + and − marks inside. There are two in the kit - together 6V.
Session 1
3 Rigid connector
Connectors 1-6 Snap Connectors
A rigid connector, not a wire - a block bar that bridges two snap buttons. The number on it = how many spaces it skips. Just a “road”; it does nothing on its own.
Session 1
Flexible
Flexible snap wires Snap Jumper Wires
Red and black, with a snap button at each end - the only part in the kit that bends. They bridge distance, and with a paper clip on the snap button they also connect to the world outside: lemon, nail, aluminum foil.
Session 3
Output - the circuit does something in the world
2.5V
2.5V Lamp Lamp
A small bulb with a filament. It heats up, glows, and doesn’t care about direction.
Session 1
+
LED LED
Efficient and cool - but it needs a resistor and is sensitive to direction.
Session 11
Motor + propeller Motor & Fan
Turns electricity into motion. The propeller always points up.
Session 9
Speaker Speaker
Turns electricity into sound through fast vibrations.
Session 10
Control - who decides when
ON OFF
Slide switch Slide Switch
ON/OFF that stays in place - it “remembers” the state.
Session 2
Push button
Push button Press Switch
Works only while you press - like a doorbell.
Session 2
Magnet
Magnetic switch Reed Switch
Closes when a magnet gets close - no touching. The heart of every alarm.
Session 15
Electric Circuits · Instructor GuideCHIPS06
05 · Know Your Kit
Parts Map · Part B
Regulation - how much and when
Ω
Resistors Resistors
They slow down the current. 100Ω · 1kΩ · 10kΩ · 100kΩ - the bigger the value, the more it slows.
Session 8
µF +
Capacitors Capacitors
Tiny tanks for electricity: 0.02µF to 470µF. The big capacitor has a direction!
Session 13
One direction
Diode Diode
A traffic cop: passes current in one direction only.
Session 11
Sensors and amplifiers - the circuit feels
Light sensor
Light sensor Photoresistor
Its resistance drops in light. The heart of the night light.
Session 12
Microphone
Microphone Microphone
Turns sound into electricity - the opposite of a speaker.
Session 16
NPN
NPN transistor NPN Transistor
A switch that a tiny current turns on. The part that built the world of computers.
Session 14
PNP
PNP transistor PNP Transistor
The same idea, in the opposite direction.
Session 14
Chips - a whole circuit in one box
MUSIC
Music chip Music IC
Ready-made melodies. The heart of the doorbell.
Session 18
ALARM
Alarm chip Alarm IC
Alarm sounds and alert modes.
Session 19
SPACE
Game chip Space War IC
Sound effects for games.
Session 20
The click rule: every block has to sound and feel connected. A half connection looks perfect and doesn’t work - and it’s the most common fault across all 30 sessions.
Electric Circuits · Instructor GuideCHIPS07
06 · Course Map
30 Sessions at a Glance
A · Foundations (1-7)
#SessionToday’s ResultConcepts
1The Path of ElectricityA closed circuit that lights a lampCircuit · current · conductor
2I Decide WhenA circuit with a switch and a buttonSwitch · open/closed
3Who Lets It Through, Who Blocks ItA table of conductors and insulatorsConductor · insulator · hypothesis
4Circuit DetectivesThree faulty circuits, fixedDebugging · short circuit
5How Much Power Is Here?Comparing 3V vs. 6V + a lemon batteryVoltage · volt · terminal
6A Chain or Junctions?A series circuit with two lampsSeries · prediction
7Each Gets Its Own PathAn independent parallel circuitParallel · junction
B · Components (8-17)
#SessionToday’s ResultConcepts
8A Brake for the CurrentA brightness ladder of four resistorsResistor · ohm
9Electricity on the Move!A flying propeller + an electromagnetMotor · energy · magnet
10Electricity TalksMaking sounds with a speakerSound · vibration
11One Way OnlyAn LED with a protective resistorLED · diode · polarity
12The Circuit That SeesAn automatic night lightSensor · threshold · automatic
13A Tank of ElectricityAn LED that fades slowlyCapacitor · charging · delay
14A Switch Without FingersA touch detector and a human chainTransistor · amplification
15Magnet MagicA drawer alarmMagnetic switch · field
16The Circuit ListensA circuit that responds to a clapMicrophone · signal
17Jumping ElectricityFour static electricity experimentsCharge · attraction · discharge
C · Systems and Skills (18-26)
#SessionToday’s ResultConcepts
18Our DoorbellA musical doorbell in a boxChip · system
19A Real AlarmAn alarm with a sensor of your choiceInput · decision · output
20Space WarA reaction game with high scoresReaction time · measurement
21Smart StreetA street model with automatic lightingAutomation · integration
22Obstacle CourseFive build challenges against the clockEfficiency · Planning
23Making Our Own ElectricityAn LED that lights with no batteryGenerator · Renewable Energy
24Secret TelegraphSending a word in Morse codeCommunication · Code · Signal
25The Steady HandA working game made of string and cardboardTouch · Precision · Prototype
26My Electric HomeSafety checklist and an energy-saving surveyHigh Voltage · Energy Use
Grade 4 · Final Project (27-30)
#SessionToday’s ResultConcepts
27What Will We Invent?A signed project sheet + a first componentSpecification · Feasibility
28Let’s Build ItA prototype that does the jobMVP · Version
29The Acceptance TestA project that passed three testsReliability · Feedback
30Showcase NightParent exhibition + certificatesPresenting · Reflection
Electric Circuits · Instructor GuideCHIPS08
01Session
The Path of Electricity
Your first closed circuit
Closed circuitBatteryBulb
Electricity isn’t “sitting” in a wire - it travels. And for it to travel, the path has to be a closed circuit: from the battery, through the part, and back to the battery. One gap anywhere along the way and nothing happens.
Today’s Result: every team lights a real bulb in a circuit they built themselves - and can explain why it lights.
+ − 3V
2.5V
3 Rigid connector
Base Board
00-06Opening HookThe instructor flicks the classroom lights off and on: “Where does the electricity travel the instant I press?” Collect guesses on the board without correcting anyone.
06-13Projected DemoThe instructor slowly builds one circuit, then pulls out one wire. The class sees the bulb go out. Put it back and it lights. “That’s the whole secret of today.”
13-33Building in TeamsEach team builds the circuit following the five steps. Roles: Builder · Checker · Navigator · Presenter · Kit Manager.
33-40Stage MomentEach team lights its bulb in turn, and the whole class counts down together: “Three, two, one - light!”
40-45Wrap-up and CleanupClosing question: “What happens if you pull out one wire?” Take everything apart and put each part back in its place in the box.

Human CircuitEnergizer

The class stands in a circle, everyone holding hands. The instructor “sends” a light squeeze that passes from hand to hand until it comes back to them - that’s current. Now one child lets go: the squeeze stops midway. “That’s an open circuit.” Reconnect, and the squeeze completes the loop again.

Guess the BulbGame

The instructor holds two hidden circuits behind their back - one complete and one with a missing wire. They hold them up one at a time, and the class calls out “It lights!” or “It doesn’t!” before the reveal. A team that’s right twice in a row earns a chip.

2Chips Challenge: Build the same circuit a completely different way - with wires of different lengths and a route that goes around the whole board. Does the bulb light with the same brightness? · For kids who struggle: The instructor leaves the circuit sketch projected on the board for the whole build and gives the team only the first part - they complete the rest on their own.
“Today you discovered that electricity has a path - and if the path breaks, everything stops. Next time we’ll learn to break it on purpose, whenever we want.”
🖥 Practice in the virtual lab: chips.interfacernd.com/US/Circuits/lab · Session 01 trainer - the exact same circuit, to drag and build on screen. Ask your instructor for the training code.
Session 01 · The Path of ElectricityCHIPS09
02Session
I Decide When
The switch - controlling the current
SwitchOpen/ClosedControl
A switch is simply a gap in the path that you can open and close whenever you want. Every switch in the world - on a wall, on a lamp, on a refrigerator - does exactly that.
Today’s Result: a circuit with a slide switch and a push button. The team turns it on and off on command, and explains the difference between the two.
+ − 3V
ON OFF
Push button
2.5V
3 Rigid connector
00-05Opening Hook“Who turned off a light at home today? What did you actually do with your finger?” Together you reach the answer: we broke the path.
05-12Projected DemoThe instructor adds a switch to the circuit from the previous session and demonstrates: ON closes it, OFF opens it. Shows the two kinds of switches side by side.
12-33Building in TeamsEach team builds with a slide switch, then swaps in a push button and discovers the difference on their own.
33-40Stage MomentEach team demonstrates “Morse code”: three short blinks with the push button.
40-45Wrap-up and CleanupA chart on the board: where at home you find a slide switch and where a push button (doorbell, keyboard, elevator).

Foil SwitchEnergizer

On a piece of cardboard, attach two metal clips and connect them with a strip of foil that can be lifted. The two flexible snap wires connect the cardboard to the circuit (a paper clip slipped onto the snap button holds the foil): lower the strip and the light is on; lift it and it’s dark. Kids see that a switch isn’t magic - it’s a piece of metal that either touches or doesn’t.

Human Traffic LightGame

The instructor is the “current” and walks a loop around the room. One child is the switch, and a raised hand = OFF. The instructor must stop immediately. Swap roles fast - anyone caught still walking when the switch is open sits out a round.

2Chips Challenge: Build a circuit with two switches in a chain. What has to happen for the bulb to light? (Hint: both must be ON - just like a door with two locks.) · For kids who struggle: Give the team a pre-built circuit that is missing only the switch - all that’s left is to snap it into the right place.
“Now you control electricity. Next time we’ll find out which materials are willing to carry it - and which refuse.”
🖥 Practice in the virtual lab: chips.interfacernd.com/US/Circuits/lab · Session 02 trainer - the exact same circuit, to drag and build on screen. Ask your instructor for the training code.
Session 02 · I Decide WhenCHIPS10
03Session
Who Passes It On, Who Stops It
Conductors and insulators
ConductorInsulatorInvestigation
Not every material is willing to carry electricity. Metal - yes. Plastic, wood, rubber - no. That’s exactly why electrical wires are made of metal inside and plastic outside.
Today’s Result: each team sorts 8 classroom objects into a “conductor / insulator” chart - after testing each one in a real circuit.
+ − 3V
2.5V
Flexible
3 Rigid connector
00-05Opening HookThe instructor holds up a real cut electrical wire: “Why is there plastic around the metal here? Who is protecting whom?”
05-11Projected DemoTest two objects together: a key (it lights!) and a plastic ruler (nothing). Define the two words.
11-34Team InvestigationEach team gets 8 objects and a chart: coin, scissors, rubber band, pencil (the tip too!), eraser, key, pencil case, aluminum foil. Guess before each test.
34-41Stage MomentEach team shares one surprising finding. It always comes up: the pencil tip conducts! (carbon)
41-45Wrap-upWhy a wall outlet is covered in plastic - and the course safety rule.

Salt Water ConductsEnergizer

Two cups: one with tap water, one with water and a lot of salt. Dip the ends of two flexible snap wires (with a paper clip on each end, not touching each other) and connect them to the circuit with the bulb. In plain water - almost nothing. In salt water - the bulb glows. Conclusion: that’s why you must never touch electricity with wet hands - the human body is salty.

Conductor HuntersGame

60 seconds: each team brings one object from the classroom that they’re sure will conduct. Test them on stage. A team that’s right earns a chip. A team that surprises the class with an unexpected object earns two chips.

2Chips Challenge: Find one object that is both a conductor and an insulator - depending on where you touch it (hint: scissors with plastic handles, a pencil). · For kids who struggle: Prepare a bag ahead of time with just 4 clear-cut objects (coin, rubber band, key, eraser) - fewer items, more wins.
“You discovered that electricity is picky. Next time we’ll find out what happens when we give it too many paths - and what a short circuit is.”
🖥 Practice in the virtual lab: chips.interfacernd.com/US/Circuits/lab · Session 03 trainer - the exact same circuit, to drag and build on screen. Ask your instructor for the training code.
Session 03 · Who Passes It On, Who Stops ItCHIPS11
04Session
The Circuit Detectives
Faults, short circuits, and a way of thinking
DebuggingShort circuitMethod
A circuit that doesn’t work isn’t a failure - it’s a puzzle. Today kids get a fixed method for finding the fault, and the idea of a “short circuit”: when electricity finds a shortcut and skips the part.
Today’s Result: each team fixes three faulty circuits - and explains exactly what was broken in each one.
+ − 3V
2.5V
ON OFF
3 Rigid connector
Base Board
00-06Opening HookThe instructor tries to light a circuit in front of the class - and it doesn’t work. “Great! We have a bug.” They demonstrate the three steps out loud.
06-12The Three-Step Method1. Look along the whole path with your finger. 2. Press every connection again. 3. Swap one part at a time.
12-35Station RotationTeams rotate among three faulty stations the instructor prepared in advance, and write down what they found at each one.
35-41Stage MomentEach team reports on one station: what was broken and how they found it.
41-45Wrap-up“A short circuit heats up the battery” - check with a finger and remember why we never do this on purpose.

Two-Finger ShortEnergizer

The instructor demonstrates a working circuit with a bulb, then connects a short wire directly across the bulb. The light goes out - even though the circuit is “complete.” The electricity chose the easy path. After 10 seconds, gently touch the battery holder: it’s warm. “That’s what a short does - it wastes all the power on nothing.”

60-Second FixGame

The instructor prepares a faulty circuit for every team at the same time. On the signal, everyone starts. The first team to light theirs shouts “Light!” But chips go only to a team that also explains correctly what the fault was.

2Chips Challenge: Make a faulty circuit yourselves and pass it to a neighboring team. You’re the only ones who know the answer - and no hinting! · For kids who struggle: Start with Station A only (a loose connection) - the most tangible fault and the easiest to feel.
“You learned to think like detectives. Next time we’ll play with the power itself - and find out what happens when we add a battery.”
🖥 Practice in the virtual lab: chips.interfacernd.com/US/Circuits/lab · Session 04 trainer - the exact same circuit, to drag and build on screen. Ask your instructor for the training code.
Session 04 · The Circuit DetectivesCHIPS12
05Session
How Much Power Is Here?
Voltage, batteries, and direction
VoltageVoltSeries
A battery is the circuit’s push, and it’s measured in volts. Two batteries push harder than one - and you can see it right away, in the brightness of the bulb.
Today’s Result: the team compares a bulb on 3V against 6V, and discovers for itself what happens when a battery goes in backward.
+ − 3V
2.5V
+
3 Rigid connector
ON OFF
00-05Opening HookThe instructor shows a picture of a watch battery, an AA battery, and a car battery: “They’re all batteries. How are they different?”
05-12Projected Demo3V and 6V side by side on the table, shown on screen. The difference in brightness stands out right away.
12-33Building in TeamsHalf the teams build 3V and half build 6V, then they switch and compare.
33-40Stage MomentEach team reports: “At 3V the bulb was ___, at 6V it was ___.”
40-45Wrap-upWhy we don’t connect 4 holders to one bulb - the part simply burns out. The right voltage is like a shoe in the right size.

Lemon BatteryEnergizer

Stick a galvanized nail and a piece of copper or a coin into a lemon (or a potato) - without letting them touch. Connect the flexible snap wires (a paper clip on each end grips the nail and the coin) and the LED. One lemon - barely. Three lemons in a chain - the LED lights! A conclusion that amazes kids: a battery isn’t magic, it’s two different metals with something sour in between.

Brightness RaceGame

Three teams build circuits at the same time, each with a different number of batteries. The classroom lights go off, and the class ranks which is brightest - without knowing who built what.

2Chips Challenge: Put the three circuits in the room in order from weakest to strongest without opening them - only by what you see and hear. · For kids who struggle: Give the team a ready-made 3V circuit and have them just add the second holder together - the comparison is the learning, not the building.
“You found out what does the pushing. Next time we’ll find out what happens when two parts share the same power.”
🖥 Practice in the virtual lab: chips.interfacernd.com/US/Circuits/lab · Session 05 trainer - the exact same circuit, to drag and build on screen. Ask your instructor for the training code.
Session 05 · How Much Power Is Here?CHIPS13
06Session
A Chain or Junctions?
Series circuit - everyone on the same rope
SeriesChainInvestigation
In a series circuit all the parts are on one rope: the current has only one path. So if one part comes out, they all go dark. Just like an old string of holiday lights.
Today’s Result: a circuit with two bulbs in series. The team predicts what will happen when one is removed - and tests it.
+ − 3V
2.5V
3 Rigid connector
ON OFF
Base Board
00-06Opening HookThe instructor tells about an old string of holiday lights where one burned-out bulb turns off the whole string. “Today we’ll find out why.”
06-12Predict Before You TestThe instructor builds two bulbs in series and asks before connecting: “Brighter or dimmer?” Kids vote by pointing, then you test.
12-34Building in TeamsEach team builds a series circuit with 2 bulbs, then tries 3. Record in the chart: how many bulbs / how bright.
34-41Stage MomentEach team demonstrates the “moment of disconnect” - pulls out a bulb while the class watches everything go dark.
41-45Wrap-upWhere is this good and where is it bad? Good: an alarm that needs everything to be working. Bad: lights in a house.

Human Relay RaceChange of Pace

The class stands in one line and passes a ball from hand to hand - that’s a series circuit. One kid in the middle folds their arms: the ball gets stuck and no one after them gets it. Now add two “loads” (kids who count to 3 before passing) - the ball arrives much more slowly. That’s exactly why the bulbs are dimmer.

Predict It RightGame

The instructor shows a hidden circuit as a diagram on the screen and asks, “What will happen?” Each team writes an answer on a slip of paper and everyone holds them up at the same time. A correct answer earns a chip. Teams can’t change their answer after seeing their neighbors’.

2Chips Challenge: Build a series circuit with a bulb and a motor together. Which one “steals” more power? What happens to the propeller’s speed? · Support option: Work with one bulb and add the second together with the instructor - the comparison is done by eye, not by building.
“One chain - everyone depends on everyone else. Next time we’ll give every part its own path.”
🖥 Virtual lab practice: chips.interfacernd.com/US/Circuits/lab · Session 06 practice - the exact same circuit, to drag and build on screen. Ask the instructor for the training code.
Session 06 · Chain or Junctions?CHIPS14
07Session
Everyone Gets Their Own Path
Parallel circuit - this is how your home is wired
ParallelIndependenceComparison
In a parallel circuit, every part gets its own path to the battery. So each one gets the full push, and switching one off doesn’t bother the others. That’s how every home in the world is wired.
Today’s Result: the team builds two bulbs in parallel, takes one out - and the other keeps shining proudly.
+ − 3V
2.5V
3 Rigid connector
ON OFF
Base Board
00-06Opening Hook“When you turn off the light in your room, does the living room light go off too? So why does that happen with a string of holiday lights?”
06-13Projected DemoThe instructor builds a parallel circuit next to last week’s series circuit. Two circuits side by side - the difference speaks for itself.
13-34Building in TeamsBuild a parallel circuit, take out a bulb, put it back. Compare the brightness with the series circuit.
34-41Stage MomentEach team takes out one bulb and announces: “And the other one is still on!”
41-45Wrap-upComparison table on the board: series vs. parallel - brightness, independence, use at home.

Two PathsChange of Pace

The instructor marks two parallel routes in the classroom from the door to the board. Half the class goes in each route. Block one route - the other group still gets through. “That’s exactly how electricity works at home: block one room, the rest keep going.”

Smart HomeGame

Each team builds a “room” with its own bulb and switch. Connect all the teams to one big classroom battery (a real parallel circuit!) and the instructor calls out: “Turn off the kitchen!” - only one team responds. After a few rounds everyone understands why parallel wins.

2Chips Challenge: Build a circuit where one bulb is always on and the other is controlled by a switch - like a hallway night-light that never goes off. · Support option: Show a projected sketch with the two paths marked in two different colors - the team just “colors in” the paths with wires.
“Now you know how every house in the world is wired. Next time we’ll learn to slow down the electricity on purpose.”
🖥 Virtual lab practice: chips.interfacernd.com/US/Circuits/lab · Session 07 practice - the exact same circuit, to drag and build on screen. Ask the instructor for the training code.
Session 07 · Everyone Gets Their Own PathCHIPS15
08Session
A Brake for the Current
The resistor - how much electricity gets through
ResistorResistanceOhm
A resistor is a deliberate bottleneck: it makes it harder for current to pass, and that protects delicate parts. The bigger the number, the more it slows the current.
Today’s Result: the team ranks four resistors by the brightness they produce - and discovers the link between the number and the result.
+ − 3V
Ω
2.5V
+
3 Rigid connector
00-06Opening HookThe instructor pours water through a wide funnel and then through a straw: “Same water, same cup. What changed?” - That’s resistance.
06-12Projected DemoShows four resistors and the color bands on them. Connects them one at a time and shows how the LED dims.
12-34Building in TeamsEach team goes through all four resistors and rates them in a brightness table: strong · medium · weak · almost off.
34-41Stage MomentTurn off the classroom lights. Each team shows its “scale” - four circuits at four levels.
41-45Wrap-up“Why do we put a resistor before an LED?” Because an LED without a resistor lasts 3 seconds. The resistor is its seatbelt.

Wide vs. Thin StrawChange of Pace

Two kids compete: one drinks water from a cup through a regular straw, the other through a very thin hot-drink straw. Same amount of water, same sucking power - and one finishes way before the other. The thin straw is a big resistor. The two kids get to explain it.

Guess the ResistorGame

The instructor builds a circuit with a resistor hidden under a cup. The class sees only the brightness and guesses which resistor it is. A team that gets it right earns a chip. After three rounds they become remarkably accurate.

2Chips Challenge: Build a circuit with two resistors in series. Is the LED brighter or dimmer than with one resistor? (Hint: two bottlenecks in a row.) · Support option: Work with just two extreme resistors (100Ω vs. 100kΩ) - the difference is dramatic and impossible to miss.
“Now you know how to slow down electricity. Next time we’ll turn it into real motion.”
🖥 Virtual lab practice: chips.interfacernd.com/US/Circuits/lab · Session 08 practice - the exact same circuit, to drag and build on screen. Ask the instructor for the training code.
Session 08 · A Brake for the CurrentCHIPS16
09Session
Electricity Moves!
The motor and the flying propeller
MotorMotionEnergy
A motor turns electricity into motion. It works because of the magnets inside - the same principle that drives electric cars, fans and trains.
Today’s Result: the team runs a motor with a propeller, controls its speed with a resistor, and reverses the spin direction.
+ − 3V
ON OFF
Ω
00-06Opening HookThe instructor spins a small fan by hand: “What makes it spin on its own? There isn’t a single gear in here.”
06-12Safety and DemoIron rule: the propeller points at the ceiling, never at faces or hair. Demonstrate a controlled liftoff.
12-33Building in TeamsRun it, adjust with a resistor, and discover the direction reversal - the most surprising moment.
33-41Stage MomentLiftoff contest: each team launches a propeller, and you measure who got highest (hand on the wall).
41-45Wrap-upWhere are the motors at home? Fan, washing machine, mixer, toys - count how many they found.

Electromagnet from a NailChange of Pace

Wrap thin copper wire around a large nail (30-40 turns) and connect it to a battery through a switch - and the nail picks up paper clips! Switch off - everything drops. Now add turns: it picks up more. This is exactly what’s inside the motor, and from here kids understand that a motor is a magnet switched on and off very fast.

Propeller RaceGame

Each team launches its propeller from the same line. Measure the landing distance in steps. Second round: you may change one thing in the circuit (take out a resistor, add a battery) - and see if you improved.

2Chips Challenge: Build a “two-speed fan”: one switch for full speed, a second switch that adds a resistor to the path and slows it down. · Support option: The team gets the motor already connected and focuses only on the two experiments: slowing down with a resistor, and reversing direction.
“You turned electricity into motion. Next time we’ll turn it into sound.”
🖥 Virtual lab practice: chips.interfacernd.com/US/Circuits/lab · Session 09 practice - the exact same circuit, to drag and build on screen. Ask the instructor for the training code.
Session 09 · Electricity Moves!CHIPS17
10Session
Electricity Talks
The speaker, sound and vibrations
SpeakerSoundVibrations
Sound is vibrations in the air. A speaker is a part that vibrates according to the electricity reaching it - and so it turns current into the sound we hear.
Today’s Result: the team produces different sounds from the speaker and discovers how parts in the circuit change the sound.
+ − 3V
Push button
Ω
µF +
00-06Opening HookThe instructor asks everyone to put a finger on their throat and say “ahhhh.” “Feel that? That’s a vibration. That’s how every sound in the world is made.”
06-12Projected DemoConnect a speaker and press - click. “The speaker jumped once.” Show the center moving.
12-34Building in TeamsMake clicks, add a capacitor and resistors, and discover how the sound changes.
34-41Stage MomentCHIPS Orchestra: the instructor conducts, each team “plays” a click in turn - and a class rhythm emerges.
41-45Wrap-upWhat’s the difference between a speaker and a buzzer? A speaker can make any sound, a buzzer only one.

Speaker from a Cup and PlasticChange of Pace

Stretch a plastic bag over the mouth of a cup, secure it with a rubber band, and sprinkle grains of rice on top. Bring a working speaker close (or just talk loudly into the cup) - the rice jumps. Invisible vibrations become visible. The kids see sound for the first time.

Secret BroadcastGame

Each team invents a “code” of three clicks (long-short-long). One team plays behind a divider, and the rest try to copy it exactly. Whoever copies it correctly earns a chip for both teams.

2Chips Challenge: Can you get the speaker to make a sustained sound and not just a click? (Hint: what happens if you press and release very, very fast?) · Support option: A battery-button-speaker circuit is enough. The click itself is the success - the capacitor and resistors are a bonus.
“Electricity can light up, move and talk. Next time - a part that knows only one direction.”
🖥 Virtual lab practice: chips.interfacernd.com/US/Circuits/lab · Session 10 practice - the exact same circuit, to drag and build on screen. Ask the instructor for the training code.
Session 10 · Electricity TalksCHIPS18
11Session
One Way Only
The LED and the diode - a one-way street
LEDDiodePolarity
Some parts care about direction. A diode and an LED pass current in one direction only - flip them, and nothing happens. It’s an electrical one-way street.
Today’s Result: the team lights an LED with a protection resistor, flips it, sees it go out - and explains why.
+ − 3V
+
One direction
Ω
ON OFF
00-06Opening HookThe instructor draws a one-way street with a sign: “What happens to a car driving the wrong way?”
06-12Projected DemoLights an LED, flips it, it goes out. Flips it back, it lights up. Does this three times - the class is hooked on the mystery.
12-34Building in TeamsLight it, flip it, test a diode. Compare: an ordinary bulb doesn’t care about direction - an LED does.
34-41Stage Moment“Light Show”: turn off the lights, each team lights an LED - the whole class twinkles.
41-45Wrap-upWhy are all the bulbs at home LEDs today? Efficient, cool, and they last for years.

One-Way Cardboard GateChange of Pace

Build a cardboard “gate” at the classroom entrance that opens in only one direction (a door with a stop). Kids try to pass from both sides: from one side they get through easily; from the other they get stuck. That’s exactly a diode. From that moment the word “diode” means something real.

Secret ColorGame

The instructor gives each team an LED of a different color (red/green) in a closed box. The team builds, lights it and reports only the color - and the class guesses who got what. Mixes fun with a check that the connection is correct.

2Chips Challenge: Build a circuit with two LEDs facing opposite directions in parallel. What will happen? And what will happen if you flip the battery? (It’s actually a direction indicator!) · Support option: The team gets the circuit already built with the resistor in place, and only inserts and flips the LED - one clear action.
“You learned that parts have a direction. Next time we’ll build a part that sees light.”
🖥 Virtual lab practice: chips.interfacernd.com/US/Circuits/lab · Session 11 practice - the exact same circuit, to drag and build on screen. Ask the instructor for the training code.
Session 11 · One Way OnlyCHIPS19
12Session
The Circuit That Sees
The light sensor and the night light
SensorAutomaticLight
A sensor is a part that feels something in the world and turns it into electricity. The light sensor changes its resistance according to the amount of light - so the circuit “knows” whether it’s day or night.
Today’s Result: an automatic night light: cover the sensor - the light turns on by itself. Uncover it - it turns off.
+ − 3V
Light sensor
+
NPN
Ω
00-06Opening Hook“Who knows how streetlights know to turn on in the evening? Does someone walk by and flip a switch?”
06-13Projected DemoThe instructor covers the sensor with a palm - the light turns on. The class asks for it again. And again.
13-34Building in TeamsBuild the night light. Try it out: a phone flashlight on the sensor, paper, a finger.
34-41Stage MomentTurn off the classroom lights - all the lamps in the room turn on together. An especially impressive moment.
41-45Wrap-upWhere are light sensors? Streetlights, a phone screen that dims, cameras, automatic doors.

Step-by-Step ShadingChange of Pace

Measure the response: sensor uncovered (full light) ← hand 8 inches (20 cm) away ← hand closer ← fully covered with a cup. At each step record whether the LED is off / dim / bright. Kids discover it’s not “yes or no” but a scale - and that’s where the idea of a “threshold” comes from.

Race in the DarkGame

The instructor walks around the room with a flashlight. When the beam lands on a table, that team’s lamp must turn off. A team whose lamp didn’t respond correctly checks its circuit. A game that is really a functionality check.

2CHIPS Challenge: Flip it: build a circuit where the LED turns on in the light and off in the dark. (Which part has to switch places?) · Support option: The team gets the circuit already wired and focuses only on calibration: swap a resistor and see how the sensitivity changes.
“You built a circuit that senses. Next time - a circuit that remembers.”
🖥 Practice in the virtual lab: chips.interfacernd.com/US/Circuits/lab · Session 12 practice - the exact same circuit, to drag and build on screen. Training code from the instructor.
Session 12 · The Circuit That SeesCHIPS20
13Session
A Tank of Electricity
The Capacitor - Charging and Discharging
CapacitorTimeStorage
A capacitor is a tiny tank that stores electricity and releases it slowly. It explains why an LED fades out gradually, and why devices keep a bit of “leftover power” for a moment after they’re switched off.
Today’s Result: an LED that lights when you press - and fades out slowly after you let go. The team controls the fade-out time.
+ − 3V
µF +
+
Ω
Push button
00-06Opening HookThe instructor fills a cup with water and pokes a small hole in the bottom: “It filled up fast, it empties slowly. There’s a part that does exactly this with electricity.”
06-13Projected DemoCharges a capacitor, disconnects the battery completely - and the LED stays lit for a few more seconds. “Where is the electricity coming from?!”
13-34Building in TeamsBuild, measure the fade times of two different capacitors, and record them in a table.
34-41Stage MomentA “who lasts the longest” contest - with a stopwatch on the screen.
41-45Wrap-upWhere are capacitors? A camera with a flash, a remote control, every electrical device in the house.

Bucket with a HoleChange of Pace

Two buckets: one with a big hole and one with a tiny hole. Fill both and time how long each takes to empty. The bucket with the tiny hole = a big capacitor with a big resistor. The time measured with the buckets matches the LED’s fade time exactly - and it ties the idea to something physical: hands and water.

Precise TimingGame

Each team tries to tune its circuit so the LED fades out in exactly 3 seconds - no more, no less. Swapping the capacitor and resistor is allowed. The class counts out loud. The closest team takes the chips.

2CHIPS Challenge: Build a “stairwell light”: one press turns it on, and the light stays on by itself for a few seconds and then goes off - just like in the stairwell of an apartment building. · Support option: Work only with the big capacitor (470µF) - the fade is slow and clear, and you can’t miss it.
“Now you have a circuit that remembers for a moment. Next time - a switch with no fingers.”
🖥 Practice in the virtual lab: chips.interfacernd.com/US/Circuits/lab · Session 13 practice - the exact same circuit, to drag and build on screen. Training code from the instructor.
Session 13 · A Tank of ElectricityCHIPS21
14Session
A Switch Without Fingers
The Transistor - the Little Amplifier
TransistorAmplificationTouch
A transistor is a switch that’s opened by a tiny current instead of a finger. There are billions of them in every phone - and it’s the foundation of every computer in the world.
Today’s Result: a circuit that turns on from the touch of a slightly damp finger - the tiny current that passes through the body is enough to open the switch.
+ − 3V
NPN
+
Ω
Flexible
00-06Opening HookThe instructor holds up a phone: “Inside this are more than 10 billion tiny switches. Today we’ll meet one of them.”
06-13Projected DemoTouches the two wires - the LED lights up. The class goes wild. “I didn’t press anything - my body was the switch.”
13-34Building in TeamsBuild the touch detector. Try a dry finger, a damp finger, and two kids touching each other.
34-41Stage MomentHuman chain: the whole team holds hands, only the first and last touch the wires - and the LED lights up through everyone!
41-45Wrap-up“A regular switch needs a strong finger. A transistor needs only a hint of electricity.”

Class-Wide ChainChange of Pace

The whole class holds hands in one long chain. The kid at one end holds the red wire, the kid at the other end holds the black one. The LED lights up - through 25 kids. There’s no stronger demonstration that our bodies conduct, and that a transistor responds to a remarkably small current.

Who Conducts Best?Game

Each team measures the LED’s brightness with the touch of each member, and ranks them. Wet or warm hands conduct better. Explain why - and stress that it isn’t “talent,” it’s physics.

2CHIPS Challenge: Turn the touch detector into a water detector: what happens if, instead of fingers, you dip the two wires in a glass of water? Is the result the same in every glass? · Support option: The team gets a ready-made circuit and focuses on the touch experiment - the feeling of “my body turned this on” is the learning.
“This is the part that built the computer world. Next time - magnets and doors.”
🖥 Practice in the virtual lab: chips.interfacernd.com/US/Circuits/lab · Session 14 practice - the exact same circuit, to drag and build on screen. Training code from the instructor.
Session 14 · A Switch Without FingersCHIPS22
15Session
Magnetic Magic
The Magnetic Switch and the Door Alarm
MagnetreedSecurity
A magnetic switch closes without being touched - a magnet just has to get close. That’s exactly the mechanism that detects a door or window being opened, in every alarm system in the world.
Today’s Result: a drawer alarm: lift the lid - the magnet moves away, and the circuit shouts.
+ − 3V
Magnet
+
Electromagnet
00-06Opening HookThe instructor asks: “How does the store know you walked in? How does the alarm know the window was opened?”
06-13Projected DemoMoves a magnet toward and away from the camera - the LED turns on and off as if by itself.
13-34Building in TeamsBuild the circuit, measure the activation distance, and build a real box alarm.
34-41Stage MomentEach team sets its box on the table. The instructor tries to “steal” - and the class erupts in beeping.
41-45Wrap-upWhy is this better than a regular switch on a door? There are no parts to break, and you can’t bypass it by hand.

Invisible FieldChange of Pace

Sprinkle iron filings (or small paper clips) on a sheet of paper, and move a magnet underneath. The clips line up - the kids see the magnetic field. Conclusion: the magnet acts through the paper, with no contact. Exactly like on the reed switch inside the block.

Thief and GuardGame

One team builds an alarm and hides the magnet. A second team tries to open the box without setting it off (it may use a magnet of its own!). The defending team that manages to stop them gets chips. The attacking team that manages to get around it gets double chips.

2CHIPS Challenge: Build an alarm that starts beeping only when the magnet moves away (a door opens), and not when it gets closer. What change does the circuit need? · Support option: It’s enough to find the activation range: how many centimeters away the magnet has to be. That’s already a full result.
“Your circuit keeps secrets. Next time it will hear you.”
🖥 Practice in the virtual lab: chips.interfacernd.com/US/Circuits/lab · Session 15 practice - the exact same circuit, to drag and build on screen. Training code from the instructor.
Session 15 · Magnetic MagicCHIPS23
16Session
The Circuit Listens
The Microphone and the Clap
MicrophoneSoundActivation
A microphone is the opposite of a speaker: it takes vibrations in the air and turns them into electricity. With a transistor to amplify them, you can switch things on with your voice.
Today’s Result: a circuit that reacts to a clap: the LED blinks at every sharp noise.
+ − 3V
Microphone
NPN
+
Ω
00-06Opening Hook“How does the voice assistant on your phone know you spoke? What did it actually hear?”
06-13Projected DemoThe instructor claps - the LED jumps. Whispers - almost nothing. Shouts - a big jump.
13-34Building in TeamsBuild and calibrate: how hard do you have to clap for it to respond? Move your hand away and test again.
34-41Stage Moment“The Clap Wave”: the class claps in a wave from one side to the other, and the LEDs light up one after another.
41-45Wrap-upA microphone and a speaker are exactly the same idea - just in opposite directions.

Cup TelephoneChange of Pace

Two plastic cups with a taut string between them. One person talks into a cup, the other listens - the vibrations travel through the string. “That’s exactly what the microphone does, except that instead of a string it turns the vibration into electricity.” A classic experiment that always works, and ties sound, vibration, and electricity together in one sentence.

Total SilenceGame

All teams calibrate to maximum sensitivity. Class challenge: keep the LEDs off for a full 30 seconds. The team whose LED lights up first is out. A game that gets laughs and calms a rowdy class at the end of a session.

2CHIPS Challenge: Build a circuit where a clap turns on the LED, and it stays on for a few seconds afterward. (Hint: which part from Session 13 stores electricity?) · Support option: It’s enough for the LED to respond to a loud shout. Fine calibration is a bonus for those who get there.
“Your circuit sees, feels, and hears. Next time we’ll see electricity jump through the air.”
🖥 Practice in the virtual lab: chips.interfacernd.com/US/Circuits/lab · Session 16 practice - the exact same circuit, to drag and build on screen. Training code from the instructor.
Session 16 · The Circuit ListensCHIPS24
17Session
Jumping Electricity
Static Electricity - the Invisible Spark
StaticChargeExperiment
Electricity doesn’t need a battery. Charges build up on objects when you rub them - and then they jump. It’s the same electricity as lightning, just classroom-sized.
Today’s Result: every kid does three static experiments and explains in their own words what a charge is.
Flexible
+
00-06Opening Hook“Has anyone ever gotten a little zap from a door handle or a slide?” Everyone raises a hand. “Today we’ll find out why.”
06-12Projected DemoA balloon on a volunteer’s hair - the hair stands up. The class laughs, and then starts asking questions.
12-36Four Experiment StationsTeams rotate through four stations and record on the task sheet what happened at each one.
36-42Stage MomentA “how long does the balloon stay on the wall” contest - with a class-wide count.
42-45Wrap-upLightning is exactly the same thing - just between a cloud and the ground, and enormous.

Bending a Stream of WaterChange of Pace

Turn on a faucet to a stream as thin as a thread. Bring over a plastic ruler that’s been rubbed well on hair or wool - the stream bends in midair toward the ruler, with no contact. This is the experiment that makes kids this age gasp. It works best on a dry day.

Paper Bits RaceGame

Each team gets a pile of small paper bits and a balloon. 30 seconds: who picks up the most bits in one go? Teams discover on their own that longer rubbing = more charge.

2CHIPS Challenge: Try all the experiments near an open window on a humid day, and then in a dry area of the classroom. Where does it work better - and why do you think so? · Support option: Start and finish with the balloon and paper bits - the experiment most likely to succeed, and every kid does it on their own.
“You saw electricity with no wires and no battery. Next time we go back to the kit - with a part that plays music.”
🖥 Practice in the virtual lab: chips.interfacernd.com/US/Circuits/lab · Session 17 practice - the exact same circuit, to drag and build on screen. Training code from the instructor.
Session 17 · Jumping ElectricityCHIPS25
18Session
Our Doorbell
The Music Chip
ChipMusicSystem
A chip is a part that already has a complete, complex circuit inside it that someone designed. We don’t build it - we use it, just like real engineers.
Today’s Result: a working musical doorbell: one press plays a whole melody through the speaker.
+ − 3V
MUSIC
Push button
+
00-06Opening HookThe instructor plays a doorbell sound from a phone: “There’s a melody stored inside this bell. Where is it stored?”
06-13Projected DemoAssembles the chip and shows: “Everything you’ve built so far, someone already built here in miniature - and we just connect it.”
13-34Building in TeamsBuild the bell, add a blinking LED, and adjust the volume.
34-41Stage Moment“Bell Orchestra”: each team plays in turn, and then everyone together for three seconds of happy chaos.
41-45Wrap-upWhy do we use chips? Because nobody rebuilds what already works. That’s exactly what engineers do.

Bell in a BoxChange of Pace

Each team puts its circuit inside a shoebox and punches a hole for the button. Suddenly it’s not a “kit on a table” but a product. Add a name and a sticker - and the students treat it completely differently. It’s also the first practice toward the Final Project.

Guess the MelodyGame

Each team plays, and the class tries to identify the melody or invent a name for it. Then each team demonstrates its own “rhythm” in presses - a short bell, a long one, a double.

2CHIPS Challenge: Build a bell that plays only when it’s dark (combine it with the light sensor from Session 12) - a night bell that doesn’t wake the whole house during the day. · Support option: The team gets the chip already attached to the board and connects only the battery, speaker, and push button.
“You used a part that someone designed for you. Next time - a chip that guards your stuff.”
🖥 Practice in the virtual lab: chips.interfacernd.com/US/Circuits/lab · Session 18 practice - the exact same circuit, to drag and build on screen. Training code from the instructor.
Session 18 · Our DoorbellCHIPS26
19Session
Real Alarm
The alarm chip and the security system
AlarmSystemProtection
A real system connects a sensor + a brain + an output. Today you build all three: something that senses, a chip that decides, and a speaker that announces.
Today’s Result: a full drawer/backpack alarm - with a sensor, a sound, and an LED - that each team builds on its own.
+ − 3V
ALARM
Magnet
Light sensor
00-06Opening HookThe instructor shows three posters: Input → Decision → Output. “Every smart device in the world is built from these three.”
06-13Projected DemoBuilds an alarm and demonstrates a break-in. The class calls out: “That’s the input! That’s the output!”
13-35Building in TeamsEach team chooses which sensor to use - and that’s their first engineering decision.
35-42Stage Moment“Break-in test”: the instructor walks between the tables and tries to steal an item from each team.
42-45Wrap-upWhat would happen without a sensor? Without a chip? Every part is essential - that’s a system.

Tripwire AlarmRoutine Breaker

Stretch a thin string across a classroom aisle and attach the magnet to it. Someone trips on it - moves the magnet - and the alarm screams. An exciting “trap” that shows a sensor is anything that translates a change in the world into an electrical change.

Guard DutyGame

The instructor announces that there’s a “treasure” (a box of candy) on their table. All the teams guard it together with their alarms. One of the kids tries to sneak up while the whole class watches. If the alarm catches them, the whole class earns a chip.

2CHIPS Challenge: Build an alarm with two sensors: both a door that opens and a light that turns on. What happens when both are triggered? Can you tell them apart? · For kids who need support: Start with the magnetic sensor only - the most hands-on for kids, and it’s hard to get confused.
“You built a real system. Next time - a game.”
🖥 Practice in the virtual lab: chips.interfacernd.com/US/Circuits/lab · Session 19 practice - the exact same circuit, to drag and build on screen. Training code from the instructor.
Session 19 · Real AlarmCHIPS27
20Session
Space War
The game chip and reaction time
GameReactionElectronics
Electronics is fun, too. The game chip makes sound effects, and with it you build a class reaction game - and learn to measure time and results.
Today’s Result: a working reaction game: who presses first when the light comes on - with a class high-score board.
+ − 3V
SPACE
Push button
+
00-06Opening HookThe instructor plays space sounds: “Where do all the sounds in games come from? Does someone record them?”
06-12Projected DemoTriggers the chip with different effects and shows how the button changes the sound.
12-33Building in TeamsEach team builds its own reaction game and sets the rules of the game itself.
33-42Class TournamentEach team presents its game, and the class plays. Write the high scores on the board.
42-45Wrap-upWhat makes a game good? Clear rules, fairness, and a challenge you can get better at.

Measuring Reaction Time with a RulerRoutine Breaker

One kid holds a ruler vertically, and the other holds open fingers at the bottom. The ruler drops without warning - how many cm go by before it’s caught? The fewer the cm, the faster the reaction. Measure the whole class and draw a simple bar graph - a science and math lesson inside an electricity lesson.

CHIPS ChampionshipGame

Knockout tournament: two teams, one button for each, and the instructor turns on the LED at a random moment. The first to press advances. The final is on stage in front of the whole class.

2CHIPS Challenge: Add a “penalty” to the game: whoever presses before the light comes on loses their turn. How can you build that into the circuit? · For kids who need support: Build the circuit with just one button and play against your own best time, not against an opponent.
“You’re halfway there and you’re already building games. In the next part - real systems and a project of your own.”
🖥 Practice in the virtual lab: chips.interfacernd.com/US/Circuits/lab · Session 20 practice - the exact same circuit, to drag and build on screen. Training code from the instructor.
Session 20 · Space WarCHIPS28
21Session
Smart Street
Automatic lighting that manages itself
AutomationIntegrationCity
A real system works without anyone remembering to turn it on. Today you combine a light sensor, a transistor, and lights - and build a streetlight that turns itself on in the evening.
Today’s Result: a street model with two lamps that turn on together when it gets dark - and switch off by themselves in the morning.
+ − 3V
Light sensor
NPN
+
2.5V
00-06Opening HookA picture of a street at night next to a street during the day: “How many workers would it take to turn on all the streetlights in the city?”
06-12Projected DemoThe instructor demonstrates the model and covers the sensor - the street lights up. Talks about saving energy.
12-35Building in TeamsEach team builds a street model on cardboard: a road, two lamps, and maybe a house.
35-42Stage Moment“Sunset in the classroom” - dim the lights gradually and all the streets light up together.
42-45Wrap-upWhat else in a city works on its own? Fountains, doors, traffic lights, irrigation.

Day and Night in a BoxRoutine Breaker

A shoebox with a peephole on one side and a “sun” (flashlight) on the other. Move the flashlight slowly - “sunset” - and watch through the hole for the exact moment the street lights up. Kids discover that there’s a threshold point, not a smooth transition, and that it can be moved.

Shared CityGame

All the teams attach their cardboard pieces to one big city on a central table. The instructor turns off the classroom light - the whole city lights up at once. A class photo is a must.

2CHIPS Challenge: Add a city “manual switch” to your street: a way to turn off all the lamps even at night - without taking apart the automatic system. · For kids who need support: The team gets the Session 12 circuit already built, and adds only a second LED and a cardboard shell.
“You built a city’s infrastructure. Next time - a game that the whole kit takes part in.”
🖥 Practice in the virtual lab: chips.interfacernd.com/US/Circuits/lab · Session 21 practice - the exact same circuit, to drag and build on screen. Training code from the instructor.
Session 21 · Smart StreetCHIPS29
22Session
Obstacle Course
The big build challenge
ChallengeCompetitionMethod
A session that’s all hands-on: five build challenges against the clock, each one practicing a different skill learned so far. No new material - it’s about mastery.
Today’s Result: each team completes at least three of the five challenges and records its times on the class chart.
+ − 3V
2.5V
ON OFF
+
00-05Explaining the RulesFive challenges, 4 minutes each. The team raises a hand when finished - the instructor approves and records the time.
05-37Challenge RoundThe instructor announces a challenge, starts a timer on the screen, and goes around to approve. Between challenges - 30 seconds to take things apart.
37-43Results ChartFill in the class chart: how many challenges were completed, and which one was the hardest.
43-45Wrap-up“What helped you be fast?” Lead them to the answer: planning and dividing roles.

Blindfold BuildRoutine Breaker

Bonus challenge: one team member closes their eyes and builds using only spoken instructions from teammates. Teams discover how important it is to describe things precisely (“the long blue block to the upper right corner”) - a funny, instructive lesson in engineering communication.

Speed BatonGame

The challenges themselves are the game. Add-on: after each challenge, the fastest team picks another team to “explain the trick” to - and earns an extra chip for teaching.

2CHIPS Challenge: Bonus challenge for anyone who finished everything: build a circuit that runs three different parts at the same time (light, sound, and motion) from one battery. · For kids who need support: A team that’s struggling starts with Challenge 1 and stays on it until it flows. One perfect challenge is better than five half-finished ones.
“Your hands already know. Next time - we’ll choose what to build ourselves.”
🖥 Practice in the virtual lab: chips.interfacernd.com/US/Circuits/lab · Session 22 practice - the exact same circuit, to drag and build on screen. Training code from the instructor.
Session 22 · Obstacle CourseCHIPS30
23Session
Making Our Own Electricity
The motor that becomes a generator
GeneratorEnergySustainability
Until now the battery has given us electricity. Today we discover the big secret: a motor that you spin makes electricity by itself. That’s exactly what happens in a power plant, a wind turbine, and a dam.
Today’s Result: the team lights an LED with no battery at all - just by spinning the propeller with their fingers or by blowing on it.
+
Flexible
00-06Opening Hook“Where does the electricity in the wall outlet come from? Who put it there?” Collect answers, and get to: someone is spinning something big.
06-13Projected DemoThe instructor spins a propeller in front of the camera and the LED lights up. “There’s no battery here. None at all.” Does it again, slowly.
13-34Building in TeamsEach team makes electricity: with a finger, by blowing, and then with a “fan” (a folded sheet of paper) held by a teammate.
34-41Stage Moment“Strong Wind” contest: who can light the LED the brightest with a single blow.
41-45Wrap-upEnergy map: sun · wind · water · coal - which of these are renewable? Mark them together.

Paper Wind TurbineRoutine Breaker

Fold a paper “pinwheel” on a pin, attach it to the motor shaft, and set it in front of a class fan or a hair dryer on the cool setting. The LED stays lit continuously. Kids build a miniature power plant - and understand firsthand why wind farms look the way they do.

Energy RaceGame

Two teams, two motors, two LEDs. On the signal - everyone spins. The team whose LED stays on continuously for 20 seconds wins. Built-in discovery: team members have to take turns - just as a power plant can’t run alone.

2CHIPS Challenge: Can you get two LEDs to light from one generator? And what happens if you connect them in series versus in parallel? · For kids who need support: A single flicker of the LED from a fast finger spin is enough. That moment - “I lit it with no battery!” - is the whole session.
“You know how to make electricity, not just use it. Next time we’ll use it to send secret messages.”
🖥 Practice in the virtual lab: chips.interfacernd.com/US/Circuits/lab · Session 23 practice - the exact same circuit, to drag and build on screen. Training code from the instructor.
Session 23 · Making Our Own ElectricityCHIPS31
24Session
Secret Telegraph
Communication, Morse code, and signals
CommunicationCodeSharing
Electricity doesn’t only light things up and move them - it carries information. With just light and sound you can send words over a distance. That’s how the world worked for decades before the telephone.
Today’s Result: two teams send each other a whole word in Morse code - and decode it correctly.
+ − 3V
Push button
+
3 Rigid connector
00-07Opening HookThe instructor flashes SOS with a flashlight: ··· --- ···. “Does anyone know what I said?” Presents the story of the telegraph.
07-14Learn 8 lettersA projected chart with A E I M O S T and more. Practice together in class: everyone “transmits” with their fingers.
14-36Transmission StationsTeams are paired up. Each pair of teams sends a word and receives a word. Three rounds.
36-43Stage MomentClass broadcast: the instructor sends one word, and the whole class decodes it together in complete silence.
43-45Wrap-up“How do we send a message today? What stays the same?” - still light and electricity, just faster.

Telegraph Between Two ClassroomsRoutine Breaker

Stretch a long wire (10-15 m) down the hallway or between the two ends of the classroom, and send a real signal from end to end. Kids see the signal travel a distance - and discover on their own that both sides have to agree on the code in advance, or there’s nothing to decode.

Secret SpiesGame

Each team invents its own secret code (3 signals = a command). Teams try to “intercept” and decode their neighbors’ code within 3 minutes. Whoever cracks it earns chips. Whoever’s code survives earns double chips.

2CHIPS Challenge: Send a two-word message without stopping - and add your own signal for the “space between words.” How will the receiver know the difference? · For kids who need support: Work with just three letters (S · O · E) and one word agreed in advance. Success is guaranteed.
“You sent words using electricity. Next time we’ll build a whole game with our own hands.”
🖥 Practice in the virtual lab: chips.interfacernd.com/US/Circuits/lab · Session 24 practice - the exact same circuit, to drag and build on screen. Training code from the instructor.
Session 24 · Secret TelegraphCHIPS32
25Session
The Steady Hand
Build a real game from simple materials
BuildingInventionGame
This time we’re not building a circuit out of the kit - we’re building a game for the kit. We take wire, cardboard, and a buzzer, and make a toy you can really play.
Today’s Result: a working “Steady Hand” game: a ring slides along a winding wire, and every touch sets off a sound and a light.
+ − 3V
+
Flexible
3 Rigid connector
00-06Opening HookThe instructor demonstrates the game and fails on purpose in the first second. The class laughs and wants to try right away.
06-12How It Works“Why does it beep when we touch it?” The class figures it out on its own: the ring and the track close a circuit. What they learned in Session 1 comes back in a big way.
12-36Building in TeamsEach team designs its own track: easy, medium, or “impossible.” Decorate it and give it a name.
36-43Class TournamentEach team sets up its game. Rotation: every student tries one game from another team. Time each run.
43-45Wrap-up“What was hard about building it?” Usually: the ring is too big or too small - and that’s exactly an iteration.

Personal Shake MeterChange of Pace

Before the game, a short experiment: each student tries to hold the ring perfectly still for 10 seconds, once after running in place and once after deep breaths. They discover that the body shakes more after exertion. Biology walks into electricity class, and kids learn that the hand is part of the circuit.

Steady Hand ChampionshipGame

A tournament with a leaderboard: who gets through the track fastest with no touches. Three leagues by difficulty level - so even kids with less steady hands find a league that fits.

2CHIPS Challenge: Add a “bonus gate” to the game: a section of the track that, if you get through it without touching, lights a green LED instead of the red one. · Extra support: A short, straight track with just one bend, and a big ring. You can make it trickier later.
“You invented a toy. Next time - we check out your house.”
🖥 Practice in the virtual lab: chips.interfacernd.com/US/Circuits/lab · Session 25 practice - the exact same circuit, to drag and build on screen. Get the training code from your instructor.
Session 25 · The Steady HandCHIPS33
26Session
My Electric Home
Safety, savings, and a home survey
SafetySavingsInvestigation
The electricity in the kit is completely safe - the electricity in the wall is not. Today we learn the difference, get to know real safety rules, and discover how much electricity our homes waste for nothing.
Today’s Result: every student leaves with a personal home checklist and three safety rules they can explain.
+ − 3V
2.5V
+
Flexible
00-08Opening HookThe instructor holds up a battery holder and a photo of an outlet: “Both are electricity. One I hand to you, the other you must never touch. Why?”
08-16The Four RulesFor each rule - a short, real story. Kids act out a scenario: a hair dryer near a bathtub, a frayed cord.
16-34Energy Use SurveyEach team gets a list of appliances and ranks them: which uses the most? (AC, oven, fridge vs. phone charger, LED bulb).
34-42Stage MomentEach team presents one “saving tip” for the home - and explains how much it saves.
42-45Wrap-upEach student writes down one task for home: check / switch off / tell a parent.

Waste HuntChange of Pace

Each student gets a sheet with eight pictures of corners of a home (TV on standby, a light on in an empty room, a charger plugged in with no phone, an open fridge). The task: mark where electricity is being wasted and why. Then do the same survey in the real home and report back next session. Learning goes home from the classroom - and parents discover a kid who turns off the lights.

Safe or DangerousGame

The instructor reads out 12 situations and shows pictures. The class votes: thumbs up (safe) or arms crossed (dangerous). The tricky situations - “touching an outlet with a plastic key” - spark a real discussion.

2CHIPS Challenge: Count how many light bulbs are in your home, and how many of them are LED. Work out with your parents: what would happen if they were all replaced? · Extra support: Focus on just two rules - outlets and water. They save lives and matter most.
“You now know how to be careful and how to save. Next time - we start planning your project.”
🖥 Practice in the virtual lab: chips.interfacernd.com/US/Circuits/lab · Session 26 practice - the exact same circuit, to drag and build on screen. Get the training code from your instructor.
Session 26 · My Electric HomeCHIPS34
07 · Final Project
The Invention Menu

Six ready-made projects to choose from in Session 27 - all use parts the kids have already learned, and all meet the feasibility rules. A team with its own idea is welcome to propose it, as long as it meets the rules too.

Light sensor
Plant Guardian
The sensor sits next to the pot: when it’s too dark for the plant, an LED lights up as a reminder to move it to the window.
Parts: light sensor · LED · transistor
Magnet
Secret Box
A box that shouts the moment someone lifts the lid - with a hidden magnet and a real alarm.
Parts: magnetic switch · alarm chip · speaker
MUSIC
Room Doorbell
A personal doorbell with a melody, and an LED that flashes for anyone who can’t hear it.
Parts: music chip · push button · LED
Microphone
Quiet Traffic Light
A classroom noise meter: quiet - green. Noise - flashing red. Helps the class stay focused.
Parts: microphone · transistor · LEDs
Emergency Fan
A small fan that turns on by itself when it’s hot - or runs from a hand-crank generator with no battery at all.
Parts: motor · propeller · switch
+
Steady Hand Game 2.0
An upgraded version of Session 25: with scoring, a bonus gate, and a track you design yourselves.
Parts: wire · speaker · LEDs

Feasibility Rules

  • Up to 4 main parts - no more.
  • At least one input and one output (something that senses, something that responds).
  • A demo of up to 60 seconds that you can show a parent.
  • You can build the first part as early as Session 27.

The Project Sheet - What Each Team Fills In

  • Product sentence: “Our ___ helps ___ by ___.”
  • Drawing: input → decision → output, with arrows.
  • Parts list and a pencil sketch of the wiring.
  • Roles and a milestone for each of the three sessions.
Choosing: the team with the most chips picks first. Two teams on the same idea - great: two versions of the same problem is exactly what engineering is.
Electric Circuits · Instructor GuideCHIPS35
27Session
What Will We Invent?
Final Project - Planning
PlanningInventionSpec
An engineer doesn’t start by building - they start by writing down what they want to happen. Today each team picks a problem, words a solution, and draws a plan.
Today’s Result: a signed project sheet: the product sentence, an input-decision-output drawing, a parts list, and a division of roles.
Base Board
+ − 3V
Light sensor
+
00-08The Project MenuThe instructor presents six ready-made projects (on the next page) - and stresses that an original idea is also fine if it follows the rules.
08-16Choose and WriteEach team chooses and writes its product sentence. The instructor walks around and signs off with one question: “Which part will you build today?”
16-36Sketch and PrototypeDraw the plan and wire up the first part for real - so the session doesn’t end on paper alone.
36-43Stage MomentEach team presents for 30 seconds: “We’re building ___ that helps ___.”
43-45Wrap-upWhat to bring or prepare for the next session - each team writes it down.

User InterviewChange of Pace

Each team interviews another team: “Would you use this? What’s missing?” Three questions, two minutes. The ideas improve right away - and this is the moment kids discover that a product is built for someone, not for the teacher.

Invention MarketGame

Each team gets 60 seconds to “advertise” its invention to the class. The rest of the class votes with raised hands for who would use it. No losers - just instant feedback.

2CHIPS Challenge: Design the project to have two modes: a regular mode and a “quiet” mode (for example, a light instead of a sound at night). · Extra support: A team that can’t decide gets three ready-made project cards to choose from - the choice narrows and they can get started right away.
“You have a plan. Next time - hands on.”
🖥 Practice in the virtual lab: chips.interfacernd.com/US/Circuits/lab · Session 27 practice - the exact same circuit, to drag and build on screen. Get the training code from your instructor.
Session 27 · What Will We Invent?CHIPS36
28Session
Let’s Build It
Final Project - Building
BuildingPrototypePersistence
Today we turn a drawing into something that exists. A prototype is the first version - it doesn’t have to be pretty, it has to work.
Today’s Result: each team holds a circuit that does the project’s main action - even if it’s rough.
Base Board
+ − 3V
+
Magnet
00-05Method Reminder“One part - test. Another part - test.” The instructor writes this on the board and leaves it up.
05-38Long BuildThe main work time. The instructor circulates, asks questions, and doesn’t touch anything. A stuck team gets a guiding question, not a solution.
38-43Stage MomentEach team demos what does work - even if it’s only partial. Applause for everyone.
43-45Wrap-upEach team says one sentence: “Next session we’ll finish ___.”

Box and ShellChange of Pace

While the circuit is being built, each team makes the product’s “body” from cardboard: a box, holes for the LED and speaker, a product name. Going from “circuit” to “product with a face” boosts motivation, and lets kids who like wiring less find a real role.

Five-Minute RescueGame

Midway through the session, the instructor stops everything: each team sends one representative to another team for 5 minutes of help. They come back with a new idea. Both teams get a chip.

2CHIPS Challenge: Also build a “test mode”: a small switch that runs the product without the sensor - so you can demo even if conditions on Showcase Night aren’t perfect. · Extra support: Narrow the project to a single action: one sensor and one output. That’s a legitimate, complete project.
“You have something that exists in the world. Next time we make it reliable.”
🖥 Practice in the virtual lab: chips.interfacernd.com/US/Circuits/lab · Session 28 practice - the exact same circuit, to drag and build on screen. Get the training code from your instructor.
Session 28 · Let’s Build ItCHIPS37
29Session
Acceptance Test
Final Project - Testing and Improving
TestingReliabilityPolish
A good product is one that works even when someone else tries it. Today we test, fix, and get ready for the show.
Today’s Result: a project that passes the three CHIPS acceptance tests, and a timed 60-second demo.
Base Board
+ − 3V
ON OFF
+
00-06Explain the three testsThe instructor deliberately demonstrates failing Test 2: operates a team’s product with no explanation and can’t get it to work.
06-28Testing RoundTeams swap and test each other’s projects. Each team fills out a feedback card for the team it tested.
28-38FixesEach team fixes things based on the feedback it got - this is the part that turns a good project into a great one.
38-43Demo RehearsalEach team practices its 60 seconds, with a clock.
43-45Wrap-upWhat to wear, who speaks, what to bring to Showcase Night.

Parent TestChange of Pace

The instructor plays a “confused parent”: holds the product upside down, asks “What does this do?”, presses the wrong spot. Teams discover they need clear labels and direction - and add arrows, stickers, and names. A product design lesson at eye level.

Judging PanelGame

Each team gets a scoring sheet and rates two other projects on three criteria: works · clear · original. The scores are collected onto the project certificate handed out on Showcase Night.

2CHIPS Challenge: Add one improvement nobody asked for - something that will surprise the judges. (A status LED? A different sound for different states?) · Extra support: Passing Test 1 is enough. If the product works three times in a row, the team is ready for Showcase Night.
“You’ve passed real tests. Now - the stage.”
🖥 Practice in the virtual lab: chips.interfacernd.com/US/Circuits/lab · Session 29 practice - the exact same circuit, to drag and build on screen. Get the training code from your instructor.
Session 29 · Acceptance TestCHIPS38
30Session
CHIPS Showcase Night
The Young Engineers Exhibition
DisplayPrideCertificates
Today the class becomes an exhibition. Each team presents its product to parents and other students, and tells the story: what we built, what was hard, and what we learned.
Today’s Result: a live exhibition of all the projects, and a “CHIPS Engineer” certificate for every student.
Base Board
+ − 3V
+
00-08Exhibition SetupArrange tables and signs, and test that every product works. Fresh batteries.
08-14Dress RehearsalEach team demos once for a neighboring team - a warm-up before the audience.
14-34Exhibition OpenParents and students walk around. Each team presents again and again - and that repetition is what locks in the learning.
34-41Certificate CeremonyEach student receives a CHIPS Engineer certificate with their name on it, and each team’s total chips are read aloud.
41-45Reflection and ClosingEach student completes the sentence aloud: “The coolest thing I built this year is ___.”

Knowledge WallChange of Pace

A classroom wall with 30 sticky notes - one session per note. Each student writes one concept they learned on a note and draws it. Parents read the wall and see the whole journey: from a closed circuit to an alarm system. A powerful visual summary of a whole year.

Parent ChallengeGame

Each team gives a parent a simple faulty circuit (a loose wire) and times how long it takes to find the problem. The kids are the experts - and they explain the method. A role-reversal moment parents remember for years.

2CHIPS Challenge: Pick one moment from the whole year and explain to the audience why that one. (The propeller that flew off? The lemon that lit an LED? The human chain?) · If a student is hesitant: a student who is nervous about presenting shows the product to their own team only, or runs the product while a friend talks - everyone has a role on the stage.
“You walked in as students and you’re leaving as engineers. Everything in your home that lights up, hums, or moves - you already know how it works on the inside.”
🖥 Practice in the virtual lab: chips.interfacernd.com/US/Circuits/lab · Session 30 practice - the exact same circuit, to drag and build on screen. Get the training code from your instructor.
Session 30 · CHIPS Finale NightCHIPS39
09 · Bonus
Activity Bank - When There’s Time Left

Eight advanced builds you can pull out at any moment: a team that finished early, a shortened session, a make-up class, or just a class that wants more. All of them use only parts already learned - and none needs advance prep.

Hard
Two Switches, Two Ways
A circuit where a bulb turns on from two different places in the room - just like a switch at one end of a hallway and another at the other end. A real logic challenge: what has to happen to make it work?
Switches · Bulb
Medium
A Light That Slowly Brightens
A big capacitor + a big resistor before the LED: the LED turns on gradually instead of all at once - like a sunrise. Change the values and time how many seconds it takes.
Capacitor · Resistor · LED
Hard
Delayed Alarm
An alarm that starts beeping only 3 seconds after the door opens - enough time to enter a “code” (turn off a switch). It combines a capacitor with the alarm chip.
Magnetic switch · Capacitor · Chip
Medium
Plant Moisture Meter
Two metal prongs stuck in the soil: moist soil conducts and the circuit closes, dry soil doesn’t. A light that says “needs water.”
Flexible snap wires · LED · Transistor
Easy
Music Box
The music chip + a magnetic switch inside a box: opening the lid plays the tune - just like a jewelry box.
Music chip · Magnetic switch · Speaker
Medium
Charging Race
Two teams, two capacitors of different sizes: whose capacitor keeps an LED lit longer after 5 seconds of charging? Measure, make a table, and draw conclusions.
Capacitors · Resistors · LED
Easy
Two-Speed Fan
One switch for full speed, a second switch that adds a resistor and slows it down. Which resistor gives the nicest “medium speed”?
Motor · Resistors · Switches
Medium
Drawer Burglar Alarm
The light sensor sits inside a closed drawer: the moment the drawer opens, light gets in - and the alarm goes off. The opposite of the night light!
Light sensor · Alarm chip
How to use: Project the card on the screen and let the team tackle it on their own - with no ready-made Build Order. That’s exactly the point: at this stage of the course they already know enough to design it themselves. A team that succeeds presents to the class and earns 3 chips.
Electric Circuits · Instructor GuideCHIPS40
10 · Bonus
CHIPS Quiz - 12 Questions

A wrap-up quiz on everything learned. The correct answer is highlighted and the explanation is below it - for the instructor only. Project one question at a time; each team writes its answer on a small board, and all teams hold them up together.

1. What must be true for a bulb to light?
Open circuit · Closed circuit · Lots of wires
✔ Only a closed path lets the current travel out and back to the battery.
2. Which material is an insulator?
Metal key · Rubber band · Aluminum foil
✔ Rubber, plastic, and wood stop the current. Metals let it through.
3. In a series circuit with two bulbs, you remove one. What happens?
The other stays lit · Both go out · The other gets brighter
✔ In series there is only one path. One break stops everything.
4. In a parallel circuit, you remove one bulb. What happens?
Everything goes out · The other keeps glowing · The battery burns out
✔ In parallel every part has its own path - that’s how every house is wired.
5. What does the resistor do?
Adds power · Slows the current and protects · Turns on a light
✔ The resistor is a deliberate bottleneck - without it, an LED burns out.
6. An LED won’t light even though everything is connected. What do you check first?
Replace the battery · Flip the LED around · Add a wire
✔ An LED has a direction! Turning it 180° fixes most cases.
7. What does the light sensor do?
Makes light · Changes its resistance with the light · Stores electricity
✔ More light = less resistance. That’s how the circuit “knows” whether it’s day or night.
8. What stores electricity and releases it slowly?
Resistor · Capacitor · Diode
✔ A capacitor is a tiny tank - like a cup with a small hole in the bottom.
9. What is a short circuit?
A wire that’s too short · A shortcut that skips the part · A weak battery
✔ The current takes the easy path, the part doesn’t work, and the battery heats up.
10. How do you turn a motor into a generator?
Add a battery · Spin it by hand · Heat it up
✔ Motion creates electricity - exactly what happens in a wind turbine.
11. What triggers a magnetic switch?
A press · A magnet getting close · Light
✔ It closes without touching - which is why it’s the heart of every alarm system.
12. What voltage is in our kit?
3-6 volts · 120 volts · 1000 volts
✔ Batteries only - completely safe to touch. The wall outlet has 120V, and you never touch that.
Scoring: a correct answer - one chip. A correct answer with an explanation - two chips. No deduction for a mistake: anyone who got it wrong gets a chance to “explain why they thought so,” and that’s worth a chip by itself.
Electric Circuits · Instructor GuideCHIPS41
11 · Bonus
Electrical Components Bingo

A 15-minute class game that practices recognizing components and concepts. Each team draws a 5×5 board and picks 24 items from the list below (plus a free center square). The instructor reads a definition - not a name - and the teams mark it.

Battery
Bulb
LED
Resistor
Capacitor
Slide switch
Push button
Motor
Speaker
Light sensor
Microphone
Transistor
Free
Magnetic switch
Diode
Music chip
Alarm chip
Rigid connector
Flexible wire
Propeller
Base Board
Closed circuit
Open circuit
Series
Parallel

How to Run It

  • The instructor reads a definition: “The part that stores electricity and releases it slowly” - the teams mark Capacitor.
  • A full row / column / diagonal = “Bingo!” and the team must explain three of them.
  • A wrong explanation = keep playing. It’s not a punishment, it’s a second chance.
  • Covering all 24 = “Full Bingo” and a double chip prize.

Variations

  • Quick Bingo: a 3×3 board only - 7 minutes, perfect for the end of a session.
  • Hands-on Bingo: instead of reading a definition, the instructor holds up the actual part from the kit.
  • Reverse Bingo: a team reads a definition it wrote itself - excellent practice in putting ideas into words.
  • Sound Bingo: the instructor runs a part behind a divider, and teams identify it by sound.
Electric Circuits · Instructor GuideCHIPS42
12 · Bonus
Discussion: Technology That Helps People

The course teaches how things work. These discussions ask what for. Each one takes 10-20 minutes, needs no equipment, and fits a shortened session, a rainy day, or the end of a unit. The only rule: the instructor asks and listens - doesn’t lecture.

How does technology help people who face difficulties?

Start with examples the kids know: a wheelchair lift, a remote for window blinds, a hearing aid, a talking crosswalk signal for people who are blind. The key question: which part from our kit is inside each one? (motor, speaker, sensor, push button). Then: “What would you build for your grandma?”

Electricity That Never Runs Out

Show pictures: a solar panel, a wind turbine, a dam. Remind them of session 23 - a motor that is spun makes electricity. Discuss: what happens when there’s no wind and no sun? (This is where the capacitor comes in - a tank that stores energy for later.) End with: where in the school could we install something like this?

A Life-Saving Device

Smoke detector, earthquake alarm, airbag, heart-rate monitor. They all work the same way: sensor → decision → alert - exactly the structure of session 19. Each team invents one new detector and draws it on the board.

What Would You Invent for Your School?

A quick round of ideas: 60 seconds per team. The only rule - use at least one sensor and one output. Vote on the idea most worth actually building, and if there’s time left - build it.

Can Technology Help Too Much?

An eye-level discussion: are there things we’d rather do ourselves? A washing machine - yes, worth it. But do we want a robot that does our homework? What would we learn and what would we lose? A question that builds critical thinking, not just excitement.

How to run a discussion with grades 3-4: one question on the board · 60 seconds of quiet thinking · one minute to share within the team · then a short class round where each team says one sentence only. This structure keeps the biggest talkers from taking all the air, and draws out ideas from the quiet kids too.
Electric Circuits · Instructor GuideCHIPS43
13 · Appendix
Glossary

Thirty terms - one per session. Kids don’t memorize them; they meet each one right when they need it. This page is for the instructor, and also for hanging on the classroom wall at the end of the course.

Electric circuitA closed path that electricity travels along
CurrentThe electricity flowing through a circuit
VoltageThe strength of the battery’s push
VoltThe unit of voltage
ResistanceHow hard it is for current to pass
OhmThe unit of resistance
ConductorA material that lets electricity through
InsulatorA material that stops electricity
Open circuitThe path is broken - no current
Closed circuitThe path is complete - there is current
Short circuitA shortcut that skips the part
Series circuitAll the parts in one chain
Parallel circuitEach part gets its own path
PolarityA part has a + side and a - side
BatteryPushes the electricity on its journey
ResistorSlows the current and protects
CapacitorA tiny tank that stores electricity
DiodeLets current through in one direction
LEDAn efficient, cool-running light
TransistorA switch that opens with a tiny current
SensorA part that senses the world
Chip ICA whole circuit in one part
GeneratorTurns motion into electricity
ElectromagnetA magnet made from electricity
Static electricityCharges that build up from rubbing
ChargeAn amount of electricity sitting on an object
Input / OutputWhat goes into the system / what comes out
DebuggingHunting for a fault step by step
PrototypeThe first version that works
SpecificationWhat the product does - written in advance
Electric Circuits · Instructor GuideCHIPS44
Kids walked in.
Engineers walked out.
Electric Circuits · Instructor Guide · 30 Sessions
CHIPS · Hands-on technology enrichment · Powered by inteRFace R&D
chips.interfacernd.com/US/Circuits
Electric Circuits · Instructor GuideCHIPS45