Engineering challenges for children. How can you make things sound louder? We look at different ways to amplify sound, using cardboard for mega megaphones. Show more
Discover 11,128,835 listings and 279,916 playable programmes from the BBC
Engineering challenges for children. How can you make things sound louder? We look at different ways to amplify sound, using cardboard for mega megaphones. Show more
The UK's most watched and most loved channel for the under-sixes, dedicated to delighting and surprising its pre-school audience.
