Magnetic spheres forming a dodecahedron. Made from twelve five-sphere rings. The rings turn into five-sided polygons when placed side by side in the dodecahedron - this is seen with a flux detector (right).
A larger one, made from ten-sphere rings.
The largest one I could make with my set, with fifteen-sphere rings. The dodecahedron was still surprisingly stable, but softer, like an over-ripe orange.