UGEARS Wooden Marble Run Kit – 3D Puzzle Wood Marble Run Stepped Hoist with 3-Stepped Lift Mechanism and 10 Marbles – Kinetic DIY Marble Run Wooden Puzzle – 3D Wooden Puzzles for Adults and Kids

The Marble Run Stepped Hoist is a sophisticated combination of art and engineering. The interplay of the 3-stage alternating lift, the 3-marble accumulator and three divergent marble tracks creates a spectacular sight. As you build this ingenious wooden 3D puzzle for kids and adults, you will learn about the interaction of mechanical gears and driven gears and the function of counterweights.
Product Dimensions 11.61 x 10.63 x 10.83 inches