HOTUT Marble Run 3D Wooden Puzzle, Self Assemble (112 Pcs) Mechanical Gear Drive, Electrical 3D Puzzle, Mechanical Model Building Craft for Teens and Adults

• 【Durable and Smooth】The 3D puzzle marble running model is made of environmentally friendly wooden materials, the pieces are smooth, burr-free, and top quality, you will get a good use experience and you will definitely love this fun trackball game.
• 【Full Packaged Product】This is a self-assembly model kit, everything you need is in the package, you don't need any additional materials. Don't be afraid to get confused among so many details, you just need to assemble it step by step following our instructions, the details are everywhere.
• 【Easy to Assemble】This puzzle has a total of 112 pieces, unique shape, fun assembly, interlocking assembly, no tools required. You may need to carefully pop out the small pieces of wood one step at a time to prevent breakage. NOTE: Woodwork is fragile and requires extreme care when assembling.
• 【Operation Method】 Use solid wood to build your own mechanical multi-gear electric rotation model. The ball quickly enters the orbit through the magic funnel of the spin accelerator. Ultra-hard core gears are linked together for an infinite loop. Note: You need to bring two AA batteries.
• 【Best Gift Choice】Wooden puzzle marble runner set makes a great sensory stimulation toy gift as well as STEAM and STEM educational toy, definitely a cool model for adults or craft enthusiasts. This is also a rewarding and fun project for teens and adults.

Product description HOTUT Marble Run 3D Wooden Puzzle Perfect decoration for coffee shops, bookstores, and living rooms. It looks beautiful on tables and display cases and makes your home more polished. Features: 1. The 3D Mechanical Wooden Puzzle Set is designed to enhance your child's hands-on skills such as coordination, physics, and STEM principles. Also suitable for adults who like challenges. 2. This is a self-assembly model kit, everything you need is in the package, you don't need any additional materials. 3. The 3D puzzle marble running model is made of environmentally friendly wooden materials, the pieces are smooth, burr-free, and top quality. 4. Boys and girls, teens or adults will love it. You will also feel a sense of accomplishment when you finish this model kit. It will also help kids work on their hand-eye co-operation skills, increase impatience and keep them focused on one thing. 5. It's worth taking the time to assemble this kit for you or a loved one, not only to save money on pre-made models, but also to add a little fun to your work and life, as it's the passion and patience that you put into your artwork. Specifications: Material: high quality wood Suggested Age: Recommended for boys and girls 14 years and older. Notice: 1. Carefully pop the wood pieces off the board. Please do not force assembly to avoid damage, and place the components according to the illustrated instructions on the number plate. 2. Two AA batteries are required but not included in the kit. 3. Due to manual measurement, there may be certain size errors. 4. Due to the shooting environment, there may be some color difference. Directions 1. Carefully pop the wood pieces off the board. 2. Assemble the puzzle step by step following the illustrated instructions on the number plate. 3. Insert two AA batteries (not included) to operate the mechanical gear drive and electrical rotation model. 4. Place the assembled puzzle on a flat surface and launch the marble through the magic funnel to start the loop.