Robotime ROKR Marble Squad Trapdoors Marble Run 3D Wooden Puzzle, LG502

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Robotime > ROKR Series Mechanical Wood Puzzles

This is the Robotime ROKR Series Marble Squad Trapdoors Marble Run 3D Wooden Puzzle. This is 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.


Robotime ROKR Marble Squad Trapdoors is a mechanical gear 3D wooden puzzle based on amazing human engineering. Its design 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 twisting turn. It will bring you a super fun building & playing experience.


  • Assemble size: 252x230x165mm
  • Wood piece: 233 pcs
  • Also known as: Cog Coaster
  • Recommended age: 14 years and up. Small parts NOT for children under 3 years old


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 as an elevator, a spiral funnel, 2 straight rails, 3 curve rails, a flip-flop as a switch to drive marbles to 2 paths.


STEM CONCEPTS: Learn principles of Science, Technology, Engineering, and Mathematics (STEM)!


HOBBY & GIFT: Precise laser cutting ensures you a fluent building experience. A great gift for family and friends.