Introducing the UGears Marble Run Chain Hoist. These laser-cut mechanical models are beautiful to look at and a true treat to operate and play with. They feature elegant systems designed by a master. The models actually work like the real thing, and the movements are smooth and intricate. No glue and special tools are needed for putting it together. Every model is made from precise, laser-cut, ecologically safe plywood and all materials are included. They’re a fun challenge the whole family can enjoy, both during the build and afterwards! Each UGears Marble Run Chain Hoist has 400 components and is rated as an ‘Advanced’ difficulty level. The estimated build time is 7 hours to completion.