Fill the gaps with wire and conductors and flip the switches so marching electrons get from − round to + and light the bulb — open gaps, insulators and shortcuts stop them.
A free, no-signup, no-ads science game for Grades 4–6 — predict what will happen, watch the real result, and see why. Explore all science games or more electricity games.
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What does Circuit Lemmings teach? Circuit Lemmings is a Electricity game: Fill the gaps with wire and conductors and flip the switches so marching electrons get from − round to + and light the bulb — open gaps, insulators and shortcuts stop them. Circuits, conductors and what makes a bulb light.
What grade is Circuit Lemmings for? Circuit Lemmings is built for Grades 4–6 (ages 9–12). Every level follows predict → observe → explain, so younger players can reason qualitatively while older ones work the numbers.
How do you play Circuit Lemmings? Make a prediction, run the experiment on screen and watch the real result, then explain the rule you saw. A wrong prediction is never a game-over — the game shows what actually happened and lets you try again.
Is Circuit Lemmings free? Yes. Circuit Lemmings is free, with no ads and no sign-up, and runs in the browser on a phone, tablet or computer.