3D Wooden Puzzle Train Model Building Kits for Children Kids

The Self Propelled Wooden Puzzle Wooden mechanical gears exclusive toy is operated by a hand wound spring. No battery, no other power need, self propelled but you need to use a little wax and the tool provided to make it move smoothly. Finally presents such a sophisticated three-dimensional wooden model. It integrates the beauty of machinery and scientific exploration, which advocates science and technology, creativity and freedom. Very Unique Mechanical 3D Puzzle, laser-cut ply wood material, no tonxic, environmental friendly, smooth wooden board. Wooden mechanical gears toy is operated by a hand wound spring, no battery, no other power need, self propelled but you need to use a little wax and the tool provided to make it move smoothly. Creative gift for your, What a fascinating thing to see the mechanical miracle coming to life by your own hands. After completing this mechanical model, you will send yourself back to the old industrial age.