Rubik cubes

Rubik cubes are three-dimensional puzzles with colored squares on each face that rotate around a central axis.

The goal is to twist the sections until each face shows a single solid color.

Named after Hungarian inventor Ernő Rubik, the cube became a worldwide craze in the 1980s and remains popular with speedcubers who compete to solve it in seconds: She can solve a Rubik cube in under a minute.