3D Puzzles Toy for Adult - Hand-Cranked Mechanical Track Ball - Brain Teaser Games Stunning Gifts for Adults and Teens, 324Pcs

Hand-cranked track ball, no power energy saving and environmental protection, suspended spiral track layer upon layer superposition, unique design, novel and interesting. Product Information Theme：Hand-cranked mechanical track ball Color: As pictured Material: Basswood Difficulty:Three stars Number of parts：324Pcs Approximate assembly time:4h Finished puzzle size:160*195*295mm Appliation: Over 14 years old. Please note:-Keep the puzzles dry.do not expose to the sun.-do not soak; otherwise it will be seriously deformed.-This product is made of wood. Be careful when assembling as it can break easily. Package list : Hand-cranked mechanical track ball 3D Wooden Model Puzzles Kit*1（The model kit comes with all accessories and a Detailed illustrated instructions instruction book.）

Material and Craftsmanship - This 3D puzzle is made of layers of natural basswood, which is made of high-quality plywood by precision laser cutting, and can be perfectly assembled without glue, it is very suitable for children and adults to build.

Assembly Tips - Non-toxic and natural plywood sheets,and necessary spare parts in case. Just be patient and after 4 hours you will make this 3d wooden puzzle for adults.

Fun to play - this wooden adult mechanical model kit will give you a very satisfying and educational user experience. By turning the crank, the ball will be gravitatively dropped along the S-shaped floating track.

STEM Project & Nice Gifts - Focused on the assembly of this wooden 3D wooden puzzle-model building kit is favorable to learn the fundamentals of engineering, improve kids' hand-eye coordination.This 3D puzzle model kit becomes one well-received gift choice no matter for adults, also teens, boys, girls, let alone puzzle enthusiasts.

After-Sale Service - Everything you need is in the package, If there is any problem, please feel free to contact us and we will provide professional after-sales service.