Female Genitals How Do Refer To The Female Genitals?

How do refer to the female genitals? - female genitals

I've always been sure what the female genitalia, as if I'm with my step-daughters (aged 5 to 2 1 / 2 call). Not necessarily remember her vagina, since only one hole, no (not the pee hole, unfortunately, can) the concept. I have difficult situations due to lack of experience of the terminology. I do not want me as anatomically correct as possible to be (they know that their little brother has a penis).