A magnet exerts a force on current-carrying wire.

This simple device shows that when an electrical current flows through a magnetic field, a force is exerted on the current. This force can be used to make an electric motor.

4 to 6 small disk magnets. (5 minutes or [...]

This experiment shows how your doorbell works.

A coil of wire with current flowing through itforms an electromagnet that acts very much like a bar magnet. The coil will magnetize an iron nail and attract it in a remarkably vigorous way.

40 feet (12 m) of insulated bell wire.