This is the big one, with multiple paths for marbles to run down that switch with every drop! This set features a rock 'n roll elevator, a flip-flop device, and a black hole attack, with curving tracks that twist and turn all around. Follow the directions to make the configuration featured on the box, then reconfigure the slides, tracks, funnels and other pieces to make your own creation! Provides hours of inventive fun while encouraging observation, planning and problem-solving. Play while learning mechanical and dynamic sciences with your friends and family.
Requires 2 C batteries, not included.