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. When you follow the instructions step by step to complete the mechanical model, you will send yourself as if back to the industrial age. Open the clockwork, it will start to exercise. This toy kit will combine the charm of the old and the mechanical power, and it will be very attractive. For ages 14 and up. WARNING: CHOKING HAZARD - Small Parts. Not for children under 3yrs.