Break it, fix it

Ask while they play

Did all three kinds of gap turn the bulb off? What happened to the moving dots when you fixed the loop?

Spot it at home

• Light switches, the button on a flashlight, the toaster lever, and the button inside the fridge door that turns its light off when the door closes.

When you flip this switch, where's the gap?

Talk about it later

Can you find three switches in the kitchen?