Grimm's Large Octagon Form Building Set - Wooden Mosaic Block Puzzle, 72 Triangles, At nearly 12 inches across, this colorful geometric block puzzle is Grimm's largest Octagon. It's a free-form puzzle for making your own creations and can also be used for
Cuboro Standard Starter Set for the award-winning wooden marble run. All fundamental elements necessary for the construction of a track system are contained in the starter sets. The various elements can be combined to countless track systems.