Hi,
Your girl may be starting her development. She will have spurts
of growth, which occur on the inside, so you may not really see anything on the outside.This is the actual breast tissue doing it's thing, before the fat begins to deposit. You will probably have this issue for a few years, usually one-three before menses starts.The usual sure fire detector there is pubic/under arm hair. I am a firm beliver that if they ask, you should tell. Explain to her using the real words, like breast and tissue..a girl should know EVERYTHING about her body and what it is doing. I had these and the sex talks with my daughter as soon as she started asking questions. I do not sugar coat things.ie having babies hurts..because, it does! =0) One lady gave you an excellent suggestion, and that is the book, the care and keeping of you, by the folks at American Girl. They actually have another, called the period book. They are straight fwd, easy to understand, with
illustrations and info that all women need to know. If you are embarrassed to buy them, go to amazon.com, and purchase there. You can often get a two for less deal. It is time to teach her about her body Mom! Best wishes
W.