From the best selling Eric Carle book "The Hungry Caterpillar" this attachable activity Caterpillar is designed to stimulate babies senses and encourage their early development. This musical caterpillar plays "Twinkle Twinkle little Star", rattles, crinkles and squeaks and has a variety of textures for little hands to explore. He also includes an attachable caterpillar ring and is a perfect companion on the move!