Detailed description and amazing charm: When you follow the instructions to complete the mechanical model step by step you will be sent back from the industrial age. Open the clockwork and it will start exercising. This toy bag will combine the charm of old and mechanical power and it will be very attractive. High-quality materials and perfect design: This is a perfectly designed DIY kit that you need to do it yourself. This mechanical wooden jigsaw puzzle is safe and easy to use with high quality plywood precision laser cutting. Manufacturered by FENGJJ-WDT. Perfect design and decoration: The model kit is not only fun but also beautifully designed! The 3D wooden treasure box puzzle has a decorative design that looks fascinating in the finished product. Showcase truly unique wooden pieces on your desk shelf or bedside table. Things to watch out for: Carefully connect the parts to make sure they work well. Do not put it in a damp place. Laser cutting and natural wood: laser cutting technology 5/1000 burr smooth touch. Natural wood processing no deformation multi-layer wood pressing real texture material and thickness.