String telephones

After learning that sound travels by vibrations through different mediums the children were tasked with making the best string telephone. We decided in order for it to be 'the best' our voices would need to sound clearest. The children were given three cup options: hard plastic, soft plastic and paper. They were also given three string options: parcel string, wool and pipe cleaners. 

They tested their predictions and then wrote conclusions on whose string phone worked the best.

Submitted by Alice Tye on