The World of Eric Carle Around the Farm Sound Book has an attached 30-button audio module that enables children to connect sound to 30 unique animal illustrations by artist Eric Carle. Each button represents an animal, bird, or insect that might be found on a farm. Press the button to hear the name of the creature and a sound associated with it. The book is recommended for children ages 3 years and older.Here is the list of the animals in the book: bull, cow, goat, pig, sheep, lamb, donkey, horse, hen, turkey, chick, rooster, cat, dog, mouse, frog, duck, turtle, fish, crow, sparrow, owl, woodpecker, snake, rabbit, cricket, dragonfly, bee, butterfly, and Eric Carle s famous very hungry caterpillar. The World of Eric Carle Around the Farm Sound Book conforms to the toy safety requirements of ASTM F963-08. Three replaceable long-life AG-13 button cell batteries that power the sound module are included.