Rubik Born: Creator of the World's Best-Selling Puzzle

Erno Rubik invented his namesake cube in 1974 as a teaching tool for spatial relationships, then spent weeks solving his own creation before realizing its commercial potential. He was a professor of architecture at the Budapest College of Applied Arts, and his original goal was to build a three-dimensional model that could demonstrate mathematical group theory to his students. The prototype was made of wood, held together by rubber bands and paper clips. It took him a month to solve it the first time. He patented it in Hungary in 1975 as the "Magic Cube," and it became a sensation in Hungarian toy shops before a businessman named Tom Kremer convinced the Ideal Toy Company to license it for international distribution. Renamed the Rubik's Cube for the Western market, it sold 100 million units in its first two years and triggered a global craze that spawned books, competitions, and a Saturday morning cartoon. The puzzle has 43 quintillion possible configurations but can always be solved in twenty moves or fewer, a mathematical fact that took decades of computer analysis to prove. Competitive speedcubing emerged in the 1980s and has since become a formal sport with world championships, where top solvers can crack the cube in under four seconds. Over 450 million cubes have been sold worldwide, making it the best-selling single toy in history. Rubik himself remained a quiet academic who never fully embraced celebrity, continuing to teach and design puzzles from Budapest while his creation became a universal symbol of problem-solving.