I-xun Rainbow Ball Puzzle Cube Magic Ball Cube Speed Fidget Ball Cube (Diameter 25.6 Inches) Excellent Design: Smooth rainbow magic ball cube, the colorful balls easy to scroll. Lot of Fun: Both to children and adults, it brings great pleasure when you play it, even it is a simple puzzle cube. Education: For kids, it can develop their brain and logic thinking ability, this cube will lead you kids to a new interest. Material: Please take it easy, the cube made of eco-friendly ABS material, non-toxic and harmless to human and environment. Tips: Just press the small ball down and scroll it instead of slide them by you finger.