6 - 8 years. Introduce your children to a variety of wild animals with these fun Learning About Different Animal Species Books for Young Readers. This set includes engaging fiction and authentic, informational texts. Children will love flipping through the books and learning about animals big and small. These books promote literacy and vocabulary development. Encourage your children to ask questions about vocabulary or concepts they are unfamiliar with. Set of 6 books with 24 - 28 pages each.