Steam Train 3D Wooden Puzzle

A wooden assembly train that can move, reminiscent of classic 19th-century industrial design. Product Name: Steam Train Material: Birch Plywood Product Size: 710*115*125MM Assembly Time: 8-10 hours Number of Parts: 413 pieces Suitable Age: 14 years and above No need for glue, seamless. High-precision CNC cutting - crafted from environmentally friendly plywood made from natural wood (occasional natural wood grain), employing high-precision CNC laser equipment, finely polished for optimized finishing, ensuring quality assurance. Mechanical power - capable of traveling directly on flat surfaces, reaching a maximum distance of 6-7 meters on a single start. Rails are used for static display. Dynamic simulation modeling - each model design requires calculation of transmission ratios, with numerous iterations of motion scenarios. Rubber band spring serves as power output, transmitted through mechanical gear structures. Special elastic potential energy drive system Linkage st