They are more interested in what it means to be male or female. Girls become closer to their mothers and boys to their fathers. Children in this age group become more reticent about asking questions. Masturbation continues to be common. Tell your child that this is not wrong, but it is something one does in private.
Masturbation is normal, and most children fondle their genitals.
Don't make your child feel guilty about being interested in his or her own body. It's OK in your room, but not in the grocery store. I found my child playing doctor with her friends. Let's talk about what you want to know. You can tell someone, 'No,' if you don't want to be touched.