Alibris makes it easy to choose age-appropriate kids books because we sort our children's books by age range, allowing you to find something for every reading level and age group. However, as your children get older and become better readers, it might be challenging to find a book based on their needs. To find age-appropriate kids books, always consider your child's reading level. For more advanced readers, look for books above their age. Letting a child choose their own book is a great way to get them reading. Just be sure to check that it's age-appropriate.