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Happy birthday, Rubik’s Cube! The mind-bending toy, known to stump most who try it, turns 40 today. The original prototype above was initially designed to be a learning tool for Rubik’s architecture students, but the well-known colorful toy has reached curious challengers worldwide. Learn more about the Cube on the Bright Ideas blog from Smithsonian’s Lemelson Center for the Study of Invention and Innovation.