RoWood Marble Run 3D Wooden Puzzles for Adults, Mechanical Model Kits, Christmas Birthday Gifts for Teens

[ All New Marble Run Model ] – The 294-pcs 3D 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 wooden building set 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 it. We are willing to offer assistance when you meet problems. [ STEM Project & Nice Gifts ] – Focused on the assembly is favorable to learn the fundamentals of engineering, improve kids hand-eye coordination. This marble run craft kit becomes one well-received gift choice no matter for adults, also teens, boys, girls, let alone puzzle enthusiasts.