3 years & up. These books offer engaging stories and illustrations that make learning math enjoyable and accessible for preschool-age children. Through these books, preschoolers will develop foundational math skills such as counting, comparing, and measuring by examining oranges, fish, and other familiar items. These books will stimulate and captivate young learners while also making it easier for adults to introduce them to math. Powerful illustrations and easy text are sure to stimulate young learners who will want to look at these books again and again. Components may vary. Set of 6.