Marble Run Gear Transmission Assembly Model Building Kits Wooden 3D Puzzles Hexagon 2 elastic straps design for

Marble Run Gear Transmission Assembly Model Building Kits Wooden 3D Puzzles Hexagon 2 elastic straps design forFeatures: . Lightweight wood, resistant to falling, durable, laser cut, smooth and burr free . Product card slot is accurate, splicing is smooth, explore the fun together, find the corresponding parts on the board, remove the parts along the laser cutting edge, do not use too much force, follow the instructions, splicing parts for model assembly . After assembling, it can be mechanically oscillated to drive the steel ball to roll through the

SKU: 2353767231 · From composequickly.com