Ugears self-rolling mechanical wheel 3d wooden puzzle designed in a steampunk style powered by rubbed bands hidden inside the mechanism of wooden kit This 3d model kit is able to roll on hard & semi-hard surfaces covering up to 5 meters on a non-inclined road (until the band&8217;s motor resource of DIY 3d puzzle is released)3d puzzles for kids & adults are easy to assemble thrill the entire family & provide fun & entertainment piecing this DIY 3d puzzle together Building this 3-D puzzle kit can be worthy for the family to complete together Teens & adults will enjoy building their own 3d wooden puzzle set Creating the wooden toy model kits is challenging & may take a few hours The hard high-quality plywood boards of this adult kit are cut into parts by laser giving hair-thin preciseness No glue required to assemble the 3d puzzle Monowheel as parts of a puzzle toys ideally fit each other & perfectly designed DIY kit that requires your hands-on work to complete Model Size 733763 in (1859516 cm) Package size 1496713 in (3781732 cm)