The 'Gomboc' (pronounced: 'goemboets') is the world's first artificial self-righting object made from a single material. In a nutshell, doesn't matter how you put it down, it always finds it's stable equilibrium.

"A shape whose  impossibility might have been an elegent theorem, but shose existance may be much more elegant."

CHANDLER DAVIS - EDITOR-IN-CHIEF, THE MATHEMATICAL INTELLIGENCER