jpstanley
Magnetix polyhedra
From left: tetrahedron, cube, octahedron, icosahedron, and pentakis dodecahedron. I was mildly surprised to learn that thing has a name; I started building a dodecahedron (in colored links) but with pentagonal faces it wouldn't stay together, so I added the silver links to reinforce it... then spotted the structure on Wikipedia when I was looking for more polyhedra to build. :)
Magnetix polyhedra
From left: tetrahedron, cube, octahedron, icosahedron, and pentakis dodecahedron. I was mildly surprised to learn that thing has a name; I started building a dodecahedron (in colored links) but with pentagonal faces it wouldn't stay together, so I added the silver links to reinforce it... then spotted the structure on Wikipedia when I was looking for more polyhedra to build. :)