Trapdoors Marble Run set LG502 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.

*Due to customs policy wax. glue or battery may not be included in packages.
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)
HOBBY & GIFT: Precise laser cutting ensure you a fluent building experience. Also a great gift for family and friends.

Specifications:

Assembled Size: 252*230*165mm
Package Size: 317*233*46mm
Wood Pieces: 233 pcs
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Unique Christmas, Birthday Gifts for Boys, Girls, Teens, Adults
With Detailed English instructions and Spare parts