Animated adventures with Bob the Builder and his friends. Wendy and Bob explain to Roley how a camera obscura works using a mirror, a lens and a dark room. Show more
Discover 11,128,835 listings and 279,933 playable programmes from the BBC
Animated adventures with Bob the Builder and his friends. Wendy and Bob explain to Roley how a camera obscura works using a mirror, a lens and a dark room. Show more