Each animal makes a different sound as its puzzle piece is placed correctly--lift to expose light sensor, then replace (cover sensor) to hear sound. Sturdy wooden puzzle board stands up to daily useImproves matching and listening skills as well as manual dexterity. 2 AAA batteries required, not included. Makes a great gift for toddlers and preschoolers, ages 2 to 5, for hands-on, screen-free play. Animal Recognition. Shape Recognition. Matching. Fine motor Skills