Fun science for preschoolers. Experimenters Samuel and Sofia visit Nina in her workshop and discover why skyscrapers need to be stronger the taller they are. Show more
Discover 11,128,835 listings and 278,125 playable programmes from the BBC
Fun science for preschoolers. Experimenters Samuel and Sofia visit Nina in her workshop and discover why skyscrapers need to be stronger the taller they are. Show more