4 Kinds Marble Race Run 3d Wooden Puzzle Mechanical Kit Stem Science Physics Toy Maze Ball Assembly Model Building For Kids

Marble Run Kit

[HIGH QUALITY] made of natural birch ply. Materials are recyclable and safe. No glue.
[DIY EXPERIENCE] – building model kit will stimulate your childs ability to plan and build their own structure like a true engineer.
[EASY SELF-ASSEMBLY] – our marble run kit is accessible for kids and adults
[BEST GIFT] marble run kit will be a worthy addition to your kid’s collection.