Erno Rubik, a Hungarian scientist obsessed with 3D geometry, first envisioned the Rubik's Cube in 1974. It took him several years, however, to work out the complex interaction of the toy's elements. And even after creating a working model, Rubik found it difficult to market his new toy due to the political and economic atmosphere -- Hungary was deeply communist at the time. Finally, in 1979, Rubik the break he was looking for when the Rubik's Cube was featured at the Nuremberg Toy Show. It captured the imagination of toy enthusiasts everywhere, and by 1982, over 100 million cubes had been sold.