This is a really informative book, without going into too much graphic detail, making it incredibly useful in helping explain bodily functions to children. I have found it invaluable with my five year old son and we often refer to it when he asks us "tricky" questions about his body. It's also useful to know how much information is appropriate for his age. We would definitely recommend it to friends to help with their children, and have even given it to parents we know as a gift when their child reaches a suitably inquisitive age!
Radiolab asked listeners for their sex ed recommendations.
Diana, a Radiolab listener, says, "My mother left it in my room one day and 'it' was never mentioned again! I grew up in the UK, I think a lot of children who are about 40 now had the same experience."