Teaching my 3 year old her body parts

So my daughter is learning the important things about her... Where she is ticklish, what kind of foods she likes, her name, and her body parts. Well she has her boobies, her butt, legs, arms and so forth all down.. I don't know what to call her vagina.. She loves to scream out that she has boobies and everyone thinks its cute. I'm nervous that if I tell her vagina, she will yell that out and everyone would think I'm not letting her be a kid and tell me to give it a silly nickname. I'm torn between being realistic mom and silly mom.