UGEARSMade in Europe, 3D Wooden Puzzle Pneumatic Engine Kit, DIY, Self-Assembly, STEM Woodcraft Construction Toy, Perfect for Gifting, No Glue Needed, Educational Engineering Project, UGR-70009

UGEARS Engine 3D Wooden Puzzle Brain Teaser Construction Set for Teens and Adults

UGEARS Steampunk Clock 3D Wooden Puzzles for Adults - Crafts Mechanical Model 3D Puzzle, Miniature Table 3D Clock Puzzle Models for Adults to Build, Unique DIY Craft Set - 40 Pcs

ROKR 3D Wooden Puzzle 1:18 Scale Formula Racing Cars for Adults, 5 Hour Build, Wind up Toys Model Car Kits for Adults to Build, Ideal Gift for Boys and Men