Young children are curious about almost everything, especially their bodies. And young children are not afraid to ask questions. What makes me a girl? What makes me a boy? Why are some parts of girls' and boys' bodies the same and why are some parts different? How was I made? Where do babies come from? Is it true that a stork brings babies to mommies and daddies?
Human body -- Juvenile literature.
Sex differences -- Juvenile literature.
Sex instruction for children.
Sex role in children -- Juvenile literature.