Create your own tower roller coaster, Metal ball can run through the tower when you rotate it. This is a perfectly designed DIY kit that requires your hands-on work to complete. This mechanical wooden puzzle toy uses precision laser cutting of high- quality plywood, which is safe and convenient Features: - Wood pieces: 219pcs - Assembled Size: 255x229x204mm - Package Size: 317x233x46mm What's in the box Everything included to assemble the kit