A cube is a three dimensional shape that is square on every side. A cube has six sides, or faces. There are many cubes around you every day. Can you see some now?
A Rubik's cube is a 3-dimensional puzzle invented in 1974. It has nine squares on each side. You can move parts of the cube around so that the colors get mixed up. When the puzzle is solved, each side will have all the squares the same color.