I LOVED THESE. Those silly rubber "Poppers" that you'd flip inside out, place on a table, and watch it scare the crap out of you when it finally popped and righted itself. Admit it, you flinched every single time.
The Rubik's Cube was released. Erno Rubik wanted to teach his kids about objects so he came up with the idea of the cube. There we over 43 quintillion ways to solve the cube, and since the over 100 million have been sold.