I really enjoyed this progressive picture book about where babies come from. The text and illustrations are completely open-ended regarding sex, gender, sexual orientation, and more, meaning that families of all types are represented here. I think that for a kid to fully understand reproduction, an adult will need to sort of fill in the blanks, making the whole process clearer in terms of that child's particular context and family situation. This book provides a building block for the understanding process, though- an explanation of the simplest components of fertilization and birth.

While I think the general concept of this book is great, I did not like the whole thing about sperm and eggs containing "stories" about the bodies they come from. That's not an effective way to explain DNA, and I think it's more confusing than it is helpful.