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
Intriguing mechanism: This fun and fascinating 3D puzzle construction features an ingenious 3-stepped alternating lift mechanism. The new features will hold your attention as you watch the marbles make their cyclical journeys
Hours of creative fun: It takes about 8 hours to build this wooden marble track. This DIY engineering kit has an “advanced” level of complexity. The mental challenge this 3D wooden puzzle presents will test your tenacity and focus while generating excitement and satisfaction