Easy snap together almost any polyhedron created of regular polygons. The hinge is designed to easy snap together and pull apart. The larger polyhedrons are quite sturdy and you can play with them without falling apart.
The included polygons has 25 mm sizes.
With the OpenSCAD code you can easily design your own size and change any dimension including number of hinges on each side. Make sure you print a few smaller pieces first to test the fit before you print any large sets.