Last updated April 10, 2019 at 4:24 pm
What did people do before telephones and the internet? How did they communicate with each other over vast distances?
1 x 9 volt battery
1 x 9 volt battery holder*
1 x small buzzer*
1 x wooden peg
2 x pieces of Aluminium foil
*available to purchase online, or from an electronics store (e.g. Jaycar)