ROKR is a DIY wooden 3D puzzle craft kit featuring mechanical gear system. The package includes a set of wood sheets with precisely laser cut pieces that assemble together to form the locomotive. It also includes a spring wind-up mechanism that integrates with the wooden gears allowing the assembled locomotive to move forward with a full wind. The item has been designed to target wide range of audience – ranging from hobbyists and puzzle builders to teens and adults who just loves making things! It can also become a great bonding project with smaller kids as a helper to find the right parts and teach them with how gears work. There are no scissors or any other tool required for assembly as all the parts fit together and lock themselves in without any glue. ROKR Locomotive is a perfect gift to bring and steal the attention on birthdays and as stocking stuffers to delight everyone with a kid inside their heart!