How to make an Working model of Electric bell

This is a simple way to make an working model of an electric model.You need wire, a nail, and some steel sheet cut from a can. Then you need a bell.

This is what you have to do. Wind the wire round the nail to make an electromagnet. Nail the strip of steel to a wooden block. Fix the electromagnet so that it pulls the steel when switched on. Then you need to make a switch which will be another arrangement of thumbtacks. So when the magnet switches on the steel pulls away from the tack and breaks the circuit. The steel hits the bell but it returns dues tothe magnet being switched off.