RoWood 3D Puzzles for Adults, Marble Run Wooden Model Kits for Adults to Build, Christmas Birthday Gifts for Teens- Marble Night City

[ All New Marble Run Model ] - The 294-pcs marble run3D Wooden Puzzle Model Kit is inspired by Rube Goldberg Machine, aiming to watch marbles racing down slides full of crazy twists and turns through tricky & fun devices! [ Multiple Ways to Play ] - This marble run wood mechanical model kit will bring you highly satisfying and educational user experience. Rotate the crank, steel marbles shall follow 3 different paths to achieve gravity fall. Every accidental or doomed choice of path will create dozens of fun to watch. [ Elaborate Structure Design ] - Black-grey appearance, combined with metal silk-printed technology, retain the wood grain while giving it a metallic texture. Full of well-designed mechanisms and small tricks, like funnel type rotary acceleration device, swinging ball separator, etc. [ Assembly Tips ] - Non-toxic and natural plywood sheets, together with illustrated English instructions, and necessary spare parts in case. Just be patient and after 7 hours you will make this 3d wooden puzzle for adults. We are willing to offer assistance when you meet problems. [ STEM Project & Nice Gifts ] - Focused on the assembly of this wooden town marble run 3d wooden puzzle-model building kit is favorable to learn the fundamentals of engineering, improve kids' hand-eye coordination. This marble run 3d puzzle model kit becomes one well-received gift choice no matter for adults, also teens, boys, girls, let alone puzzle enthusiasts.