Environmental engineering ABS material, non-toxic & lightweight, feel good.The rainbow ball include 12 holes corresponding to different 11 colors of the small ball.Rainbow magic ball has a hole surface which is empty to make way for the rainbow magic ball game.Through push the small ball on the rainbow magic ball surface,make the circle color of the rainbow ball surface match the small ball. Also it is a 3D puzzle! Perfect cube & Toy !helpful to children’s logical thinking ability and hand-brain coordination ability and color sensitivity.