This book covers everything that a child would experience in early childhood to early puberty and even beyond. It's a great resource for parents to introduce kids to their "parts between their bellies and knees." i think that it's important for children to know the correct terms and then up to the parents to tailor how they function according to the child's age and this book really helps with that. My kids are young (ages 4 & 6), so i paper clipped the puberty pages for when they are older. This is a great starter book to introduce the topic of sex education to your children would highly recommend, especially if as a parent you don't know where to start.