12 5-sided polygons that fit together to form a dodecahedron. This is probably the smallest buckyball that you could realistically make. There a solid version, and a "wired version", which is way way easier to put together. This is to mess with you geometry-lovers out there.
Version 12 is what you want. This will produce 3 self-contained shapes. You can use them separately, or hang one inside of each other. There are three triangles with holes in it which should let you attach fishing wire on.
File 7 should have everything fit together correctly, and contains 3 different sizes! If everything works out correctly, the smaller ones should be able to hang and rotate within the larger ones!
Files 3 and 4 are earlier drafts. They will fit together correctly, but the shapes are irregular and it will be much harder to assemble. You'll need to have one right side facing and other other reversed.