Simple Circuits

Classes 6–10 · about 6 minutes · free, no sign-up

What you will learn

Explain that current flows only in a complete loop, that a switch opens and closes the loop, and that current is the same all round a series circuit, so it is not used up by a bulb.

How to play

Pick a part (wire, bulb or switch), then tap a spot in the circuit to place it.
Fill every spot to close the loop. The bulbs glow and the meters show the current.
Finish three challenges: light the bulb, add a switch, and explain why two bulbs are dimmer.
Then use free play to try two batteries and three bulbs.