The Skewb (originally named the Pyraminx Cube) is a twistable puzzle in the shape of a cube that is cut diagonally 2 times along each of 4 axes. It is a cube-shaped puzzle. It consists of 6 center pieces and 8 corner pieces (four of which are attached to the central core). Unlike the Rubik's cube, which turns around faces, the Skewb turns around axes that go through its corners. It is a deep-cut puzzle (i.e. each cut goes through the absolute center of the puzzle, and exactly half of the puzzle changes with each turn).
This puzzle was originally called the Pyraminx Cube by Uwe Meffert, but Douglas Hofstadter suggested the name "Skewb", and it has been called that ever since.
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The 3x3x3 cube (also known as "Rubik's cube" and "magic cube") was invented by Ernő Rubik in 1974, and was quickly unveiled in the early 1980s.
This is a mechanical and geometric puzzle composed of with 26 elements (called cubies), which can be moved with a system of axes, that is hidden in the center of the cube. Each of the six faces is covered by 9 stickers, among six solid colours (traditionally being white, yellow, orange, red, blue, and green). The system of axes enables each layer to turn independently, thus mixing up the colours. For the puzzle to be solved, each face must be a solid colour.
It is said to be the world's best-selling toy, with over 350 millions cubes sold worldwide as of 2009.
