Five geodesic spheres nested one inside the other. The outermost sphere is a 5v sphere. The next sphere in is a 4v sphere. Each sphere is progessivly lower to the inner sphere which is a 1v (or simply an icosohedron).
Spheres are each constructed with a 1mm gap from each other and should be free moving. Edges are 1mm thick. Optimized to strong, flexible plastics.