All ages: Angel in the Waters by Regina Doman
I used this book to announce my last 2 pregnancies to our boys.
Beautiful illustrations by Ben Hatke accompany Doman's lyrical text about a baby in utero and his guardian angel. Echoes of the creation story and John's Gospel delight the ear. "In the beginning, I was," the story starts. And later, "Sometimes it was dark, and sometimes it was less dark." (See the parallel with Genesis 1?)
The story details a conversation between the baby and the angel that continues into infancy. The baby complains that the world outside the womb is too big and cold. His angel replies, "It is very big, but you will grow big. It will feel better and warmer when you are bigger. But there is another, bigger world outside this one. Someday I will take you there." This nearly repeats the words he spoke before the child's birth. The message: the child in the womb is on a journey to another world, like the rest of us.
If your children read this often enough, they may not need any other instruction to see the beauty of an unborn baby.
Read about my other 3 picks.