Give simple explanations. Use appropriate names for parts of the body and body functions. Children need a language to use when talking about their feelings, ideas, and concerns. Show your interest. Expect the same questions and concerns to resurface.
Children have difficult grasping some information.
They often need repeated assurance about the changes they are going through. Get to know your children's environment. Current jokes, the TV and news programs they're watching, their music - these will provide unlimited opportunities to discuss sexuality issues. Introduce the topic. Bringing up issues from time to time will give the message that you are interested in discussing sexuality.