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ROBOTIME LG501 big funnel marble run kit is a mechanical gear 3D wooden puzzle based on great human engineering. Its design combines the beauty of science and machines, cranking the handle, you can watch marbles run crazy down the slopes and twisting turns.
It consists of a wheel lifter, a stair stepper as an elevator, a spiral funnel, 2 straight rails, 3 curve rails, and a flip-flop as a switch to drive marbles to 2 paths.
It is good for learning principles of Science, Technology, Engineering, and Mathematics(STEM). Also a great gift for family and friends.
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