One ball with so many different options for creating a sensory experience! Inflated with air, this clear vinyl 30cm ball becomes a fun exercise that engages gross motor and visual tracking skills. The small white foam pellets contained within the interior cylinder shake and move when the ball is tossed or turned. When water is added to the interior cylinder, the pellets delicately float up and down as the ball is moved, transforming it into a gentle, soothing visual display. You can even add food coloring or metallic confetti to personalize or create some sparkle. Requires inflation. Instructions included.