• - This Marble Run 3D Wooden Puzzle Marble Run Model Kit contains 335 small pre-cut wooden pieces. The entire assembly process of this marble parkour takes about 5 hours.
• 【No Glue Required】Mechanical 3D puzzle, laser cut plywood, non-toxic, eco-friendly, smooth wood board. All parts are pre-cut, no glue required. The interlocking mechanism is very clever.
• [Detailed English description] Making this mechanical model toy requires not only carefulness, but also patience. Feel the pride of assembling the entire toy contraption with your own hands.
• - CHALLENGING BUT FUN: The Marble Parkour Marble 3D Wooden Puzzle for Adults is a great design for home decor and a great challenge for model makers. Crafting requires patience and dexterity, which is a test of your hands and eyes.
• - Educational Toys: This wooden puzzle can also be a brain teaser puzzle. It's a highly educational building experience that will leave you satisfied when you're done building and getting to work.