Rainbow Ball Rubik's Cube, the simplest adhesive free Rubik's Cube version, with a compact, fast, soft design that never hangs. Very easy to manage and reliable. Made of original environmentally friendly ABS material, non-toxic and harmless to humans and the environment. The reasonable size (diameter 7cm) and weight (150g) are very suitable for the hands and can be easily transported to the place you want. The rainbow puzzle ball is very interesting, which can practice logical thinking, color sensitivity, and hand coordination, improve patience, and enhance psychological skills. It is an ideal gift and Christmas stocking for everyone, because it is very suitable for children to develop intelligence, let adults spend time and relieve pressure. How to play: Similar to a traditional Rubik's Cube with a ceramic tile puzzle. There is a hole in the ball without a small ball inside. You can move a small ball inside the hole and continue mixing the balls. Then you must find out how to restore the color ball to the corresponding color hole.