The Trapdoors Marble Run set is a well-designed 3D wooden puzzle toy based on great human engineering. It combines the beauty of science and machines, involving so many small gadgets. Build the set and crank the handle, watch marbles run crazy down each trapdoor, slope, and twist turns. It will bring you a super fun building & playing experience..
TRACK TRAPDOORS: A handcrafted marble run set with a whole back of trapdoor track. Build it with 233 building pieces and 10 marbles.
MANY GEAR GADGETS: Consists of a wheel lifter, a stair stepper, 4 straight rails, trapdoors, and a block track. An intricate system of cogs, gears, and wheels, full of crazy twists and turns.
STEM CONCEPTS: Learn principles of Science, Technology, Engineering, and Mathematics (STEM)
