I'm a former L&D nurse & current childbirth educator. I teach natural childbirth & encourage my couples to know & understand the anatomy & physiology of pregnancy & birth.
For curious siblings & for my own kids who know more about birth than most adults, I can offer some recommendations for a gentle introduction to questions about birth:
Baby on the Way by Dr. Sears Cartoon-style drawings of a family expecting their 3rd child. Great tips on how to adapt the text to fit your specific situation(dr/midwife, hospital/home, c-section/vaginal). This was my family's favorite.
How was I Born? by Lennart Nilsson Photographs go along with the two sets of text--one simple, one more details. Beautiful photos of babies inutero. My kids liked the picots, but thought the text was too long.
Welcome with Love by Jenni Overend A beautiful story of a home birth with lovely drawings of the family & their home. FYI, a few of the drawings depict the mother as she gives birth in a standing position. No drawings of the perineum, but you do see her bare legs, belly & breasts. My dd(5yrs) LOVED this book while awaiting the birth of our fourth child.
Birth is truly wonderful & I get giddy when I'm able to share my enthusiasm for birth with people, especially my kids. :001_wub: Good luck sharing this amazing part of our human experience with your kiddos!