It is absolutely normal for her to want to grab it now and again, but girls are often too shy and bound by convention to do things like that except.
Well, I wouldn't mind touching my boyfriend's penis (we haven't gotten that far yet) . If I were to though, it doesn't mean that I would want sex. I mean, sex is not.
Need to educate her on your gear-- she could have injured your balls when she grabbed down there. Bit young though to allow her to play with.