6 years & up. Introduce your children to the expansive galaxy with this wonderful Outer Space Adventures Book Set for Young Readers. This set includes engaging fiction and authentic, informational texts. Children will love flipping through the books and learning about our planet, moon, and solar system. 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.