cardboard tubes + box = hours of fun! We pieced together TP and paper towel tubes. Used marbles. The kiddo loved it and even still pulls it out to roll the marbles into a dump truck. He wont' let me toss any cardboard tubes now.
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