Advice on book for 4 yr old boy about his body

[Heatherheathermum]

I have a 4 yr old boy who is asking a lot of questions about his body and differences between boys and girls, I have of course explained to him but would be good to have a book on bodies etc can anyone help?? Many thanks

Usborne do a lot of good books on this subject.

I can only find ones for adolesence or inside yr body!!

I've found this don't know if it's what you want. here