Robotime 3D DIY Wooden Puzzle Marble Squad Trapdoors Marble Run LG502

Features:
This is a marble run set that will definitely surprise you. Build this 3D wooden puzzle with your hands and watch the marbles run smoothly through those trapdoors. All mechanical-driven, with no battery needed.
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.


Specification:
Assembled Size: 252*230*165mm
Package Size: 317*233*46mm
Wood Pieces: 233 pcs
Original Name: Cog coaster
Magic Crush Tracks Toys-Fantastic Educational Toy
Unique Christmas, Birthday Gifts for Boys, Girls, Teens, Adults
With Detailed English instructions and Spare parts