Ugears Marble Run Stepped Hoist ★Mechanical 3D Puzzle Kit Model Toys Gift Present Birthday Xmas Christmas Kids AdultsModel size: 11. 6*10. 6*10. 8 in (29. 5*27*27. 5 cm) Package size: 14. 9*6. 7*1. 3 in (37. 8*17*3. 4 cm) Number of components: 355 Estimated time of assembly: 8 hours Level: Advanced You look "marble ous!" Introducing the Marble Run Stepped Hoist, the second in a series of Ugears modular marble runs. This fun and fascinating wooden marble run features an ingenious 3 stepped alternating lift mechanism and a set of new features to hold your attention as