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· SELF-ASSEMBLY: handcrafted Marble Run set based on real lift coaster, intricate system of cogs& gears
· GAME& GIFT: fantastic brain teaser& best gift for all ages
· TWISTS&TURNS: 233 wood pieces and 10 marbles, including a wheel lifter,a stair stepper,4 straight rails, trapdoors and a block track
· STEM: Learn principles of STEM, enjoy hands on fun
· EASY TO BUILD: precise pre-cut wood sheets, easy to assemble
Metal Ball, Plywood