Before you start
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Breadboard Lab Wire a battery, resistor, LED and switch — close the loop and watch the current flow. 
Block-Code Bot Snap blocks together and run your program step-by-step to drive the robot. 
Logic Lab Wire AND, OR, NOT and XOR gates to match the target truth table. 
Ohm's-Law Lab Predict the current — call I = V ÷ R, then watch the bulb glow to match. All activities
Build & code
Breadboard Lab Wire a battery, resistor, LED and switch on a real breadboard. Close the loop and watch the current flow — or trip a short. Probe any point with the multimeter. Block-Code Bot Snap movement, turn, repeat and if-sensor blocks together, then run your program step-by-step to drive the robot to its goal. Logic Lab Wire AND, OR, NOT and XOR gates, flip the switches, and check your circuit against the target truth table. Ohm's-Law Lab Predict the current before you run it: a battery and a resistor set V and R — you call I = V ÷ R, then watch the bulb glow to match. Same Brightness? Predict how bulbs behave in a series loop — then reveal why. Current isn’t used up as it flows: it’s the same everywhere, so identical bulbs are equally bright, adding one dims them all, and unscrewing one turns them all off.
Practice & play
Concept Kits 16 quiz kits · 400 questions from static charge to microcontrollers — a hint after a first miss, an explanation every time. Mixed Practice A short round across the kits you have played — brought back to make it stick. CircuitForge Sprint Race your OWN best on what you already know. Timer optional, no penalty for a miss. Trick Questions Brain-teasers with a twist — spot why the obvious answer is a trap. Teach the Cast Teach a piece of electricity to a cast member still learning it — teaching makes it stick. Circuit Duel 2–4 players take turns on one device — same questions, highest first-try score wins. Circuit Quest A progression trail through every kit, static charge to microcontrollers — clear each stop, then move on. Progress Your levels, streak, and how each skill area is coming along — saved on this device. Progress report For grown-ups — a private on-device snapshot mapped to the skill areas. Export a CSV or print.
Reason it out first
More ways to play
Same idea, another world
😄 Brain break
Meet the cast — the characters who teach this
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Push Voltage — the pressure difference that drives current; measured in volts -
Flow Current — electrons moving through wires; measured in amperes -
Damp Resistance — the slowdown; measured in ohms; Ohm's Law (V = I × R) emerges from Push + Flow + Damp together -
Branch Series vs parallel topology — one path or many; the topology decides the behavior -
Build Component-wiring craft — every component has a job; wire them together and the circuit comes alive -
Store Capacitance — a tank that fills with charge and hands it back; smooths bumps -
Coil Inductance / electromagnetism — a wound wire turns current into a magnetic reach -
Relay Switching / control — a gate the circuit can flip itself; small flips big -
Diode Diode — the one-way gate; current flows one direction and is blocked the other -
Fuse Fuse — the deliberate weak link that melts to break the circuit when current runs too high, protecting the line
Ensemble stories — the cast together