I would say let her or maybe use Nair. I have 9 year old step-daughters. One of them is developing much faster than her sister. I have been debating on showing her how to shave b/c the hair is getting long. However she hasn't said anything about it. I've decided if she asks me how to shave I'll show her, or if I hear that she is being made fun of. At 7, we had to start getting her deodorant, and she is developing pimples and so now we have her using face wash.