Horrible Science - Perilous PlanesLaunch glider planes, test out parachutes and spin a helicopter rotor Discover the fearsome forces involved in flight and check out death defying flying facts Based on the bestselling books written by Nick Arnold and illustrated by Tony De Saulles Contains rotor launcher, circular rotor, printed foam glider plane pieces, 2 nose weights, 4 mini fibre pens, 2 parachutes, white string, printed card sheet, 3 printed paper sheets, 6 coloured paper sheets,