Caterpillar Activity BallsEDITORS NOTE Stack em and spin em! This talented Infantino caterpillar activity balls Has two places to stack his textured, sensory balls. Place them on his tail or stack them on his nose for a fine motor skill challenge. Press the button to spin the balls and activate lights and music. Includes four stackable balls. One ball is affixed to his nose as a base for building. Color of the ball on the nose may vary from picture.