What's this?
A circuit
What's this?
Electricity
What's this?
A battery
What's this?
A robot
What's this?
A factory
What's this?
A bridge
What's this?
A rocket
What's this?
A switch
What's this?
A wire (or a cable)
What's this?
A lightbulb
What's this?
A socket
What's this?
An appliance (or an oven)
What's this?
A plug
What's this?
A magnet
What kind of power is this?
Wind power
What's this?
Oil
