3D LASER CUT METAL PUZZLES Made from polished stainless steel this mechanical model is a puzzle you build by fitting laser cut pieces together with no messy glues or adhesives required MOVEMENT The movement mechanism rotates from the momentum of the wheels The tractor has a swivel rear axle just like its real-life prototype & the cabin doors & the hood can be opened FUN FOR ADULTS &38; TEENAGERS Adults teens & older kids love the challenge of model building & kids can learn about gravity gears design & engineering concepts as they build!EDUCATIONAL TOY Enhance your creativity logical reasoning & problem-solving skills with this relaxing hobby during your spare time Parental assistance for kids under 14 recommended BUILD YOUR WORLD You can craft models that shine that move that turn your home & workplace into a tiny world of creativity Experience the joy of creating something marvelous with your own hands!