6 years & up. Take your children on an exciting adventure with these Let's Visit and Explore Books for Young Readers Grades 1 & 2. This set includes engaging fiction and authentic, informational texts. Children will love flipping through the books and learning about a marine base, a car factory, a farm, and more! 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.