My toddler twins loved the Around the Zoo book they got from a thrift store as early as age 1. I bought them this one and the Town one as well to round out the set. They are nearly two now and they still love these books. The activities age with them and it is really wonderful to see them discover new things about the pictures they see. This book is a little more advanced because of the topic (the solar system rather than a zoo or a town), but my kids still love it.