3 years & up. Contribute more educational reading to your classroom reading area with these exciting Learning Center Books Including Important Fundamentals and Leisure Reading. This set of books covers a variety of topics from buoyancy, to counting, to exercise. Children will be interested in the different options and reading about the diverse characters. For a class activity, encourage children to select their favorite book and discuss it with a partner. Components may vary. Set of 16 paperback books.