A Kid’s First Book About Sex by Joani Blank, published by Down There Press [Buy]
An introduction to sexuality for young readers, discussing feelings, bodies, and developing a positive self-image.
ISBN 0940208075

Playbook for Kids About Sex by Joani Blank (Author), Marcia Quackenbush (Illustrator), published by Down There Press [Buy]
This interactive “workbook” is designed to introduce children to ideas about sexuality and self-image and encourage them to express and explore their feelings and reactions right in the book.
ISBN 096023246X

“What’s Happening To Me?” by Peter Mayle, published by Lyle Stuart [Buy]
Using information and cartoons that are both humorous and accurate without being too graphic, this book discusses the mental and physical changes that take place during puberty in a way that’s non-threatening and encourages discussion when children want more information about these changes.
ISBN 0818403128

“Where Did I Come From?” by Peter Mayle, published by Lyle Stuart [Buy]
This book is geared to answering the “how are babies made” questions of younger children with information and cartoons that are accurate without being excessively graphic and scientific. Covers anatomical differences between men and women, love making (as a monogamous, heterosexual, married couple), conception, stages of fetal development, and birth.
ISBN 0818402539