Nina looks at different household inventions and finds out how they work. Here, she asks sound neuron, beautiful Belle, to help her find out how speakers work. Show more
Discover 11,128,835 listings and 279,890 playable programmes from the BBC
Nina looks at different household inventions and finds out how they work. Here, she asks sound neuron, beautiful Belle, to help her find out how speakers work. Show more
The UK's most watched and most loved channel for the under-sixes, dedicated to delighting and surprising its pre-school audience.
