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Feature

Environmental engineering ABS material, non-toxic reliable and lightweight
Diameter:2.68 inches, reasonable size for more easily carry
Instructions : The rainbow ball include 12 holes corresponding to different 11 colors of the small ball.
Use it as an aid to concentration, great for expanding your mind, for young and old. Helpful to children's logical thinking ability and hand-brain coordination ability and color sensitivity.
How to play-- Play it in a similar way to a magic Cube mixed with a slide-tile puzzle. There is a hole in the ball with no smaller ball inside, you can move a smaller ball to the empty hole, continue to mix up balls. Then You have to work out how to restore the color ball into orresponding color holes