This is the build your own gumball machine with integrated tracks, tricks, and stunts similar to that of a marble run. It releases one gumball at a time, sending it down slopes, through a funnel, onto a pulley system, bouncing off a trampoline, and more. Assembled using 52 pieces, the completed gumball machine holds the included 5.3 oz. of gumballs (approximately 70) in its top dome and has 12 experiments that illustrate principles of physics including gravity, inertia, momentum, acceleration, and centripetal force. Includes 16-page manual. Ages 6 and up. (3 lbs.)