The World of Eric Carle™ The Very Hungry Caterpillar™ Attachable Activity Caterpillar with Music & Sound is inspired by Eric Carle's classic tale The Very Hungry Caterpillar™. The multiple features are sure to entertain and engage your child. Antennae contains "crinkle" sound and the clear ball contains beads that spin make and rattle. Press the yellow portion of the caterpillar body to hear "Twinkle, Twinkle Little Star." Ribbon tags help stimulate tactile exploration, while the ring with sliding beads creates "cause and effect" play. Teether rings, and an apple with pocket for in-and-out play are just more of the interactive features included in the Activity Caterpillar. Adjustable straps allow easy attachment to the crib, carrier or stroller. The World of Eric Carle™ The Very Hungry Caterpillar™ Attachable Activity Caterpillar measures 18 x 2.75 x 5 inches.