I did a lot of searching for a 'facts of life' book for my two children (4yr & 6yr). I didn't want anything too graphic or too mature. I settled on three books Hair In Funny Places
and What's the Big Secret?: Talking about Sex with Girls and Boys
and this one.
This is the only one I have chosen to share with them so far (I have kept the others for when they are older as they are good but contain images and topics I don't think are suitable for this age(intercourse, masturbation, wet dreams etc.)
This book however, I felt, was just right. It mainly talks about the differences between girls and boys bodies - which at this age is what they are mainly interested in, I reckon. Please don't think the images of naked adults are in any way 'too graphic' as another review said - they are lovely and innocent in their cartoon depictions.
It does cover eggs and sperm but does not say about, or show any, sexual intercourse and my guys seemed perfectly happy without further explanation. It also only briefly mentions that their bodies will change as they get older without going into teenage issues.
Overall I think this is a great book for young children, looking at private parts without too much detail. I didn't feel embarrassed at all reading it to them. It now sits on our library bookshelf amongst all our other books.