This book is an excellent textbook for teaching anatomy with a Biblical perspective! I am a physical therapist, so I had four semesters of anatomy and physiology in college. While I have always marveled at how God created us, this book has brought even more interesting correlations to me. it has enough depth for fifth and sixth graders, yet it is concise enough to keep my six year old interested. We love the various "Try This" experiments in each chapter.