Quack! Quack! Quack! Quack! Join a mother duck as she counts her five ducklings in this interactive board book. Simply scan the provided QR code to listen and sing along! Join a mother duck as she counts her five ducklings in this interactive board book based on the beloved children's song. A QR code inside links to both instrumental and vocal versions of the song. Simply scan the code to listen and sing along--Quack! Quack! Quack! Quack!