Who Has What? All About Girls' Bodies and Boys' Bodies by Robbie H. Harris

Young children ask lots of questions.

It's one of the ways they learn about themselves and about their bodies. 
   Join siblings Nellie and Gus on a day out at the beach as they ask questions and figure out the similarities and differences between boys and girls in a humorous and honest way. With charming, informative words and pictures, this book will reassure children that whether they have a girl's body or a boy's body, their bodies are truly amazing - and totally wonderful!