Telephone inventors

Sunday 22 April 2018

This term, our topic is Inventions that changed our world.

Throughout the topic, we’ll look at different inventions, the history behind them and have a go at making some of them ourselves.

This week, we’ve been looking at the telephone, invented by Alexander Graham Bell in 1876. We attempted to make our own telephones using only string and paper cups.

We learned that the sound of our voice travels in waves down the string and the cup acts as an amplifier for the sound at the other end. We tested this theory with a long string telephone.