[Lissa]

I was working at a bookstore and we had a picture book for kids for that exact purpose. I can't think of the name off the top of my head. It just goes through a basic run down of the differences between male and female anatomy in a really soft way without going into the whole reproductive part of it.

I'm really trying to think but I can't remember the title for the life of me...if you have a bookstore near you I would recommend looking in the Parenting section if they have one. I know we kept a couple books like that in the section for younger children.