I agree with a lot of the other mamas on here, and also agree that you can't always stop a two year old BEFORE the damage is done. What I did with mine (of course, after I learned from trial and error with the first one), that if she hit somebody, I could stop her and say, "We don't hit." "We don't..." can be used for anything from hitting to writing on the walls. Say it EVERYTIME it happens, not just part of the time. Then, if she doesn't stop (give her a chance to stop, because she might), take her away from whatever it is that she is doing. I don't advise putting a two year old alone in a room, though, because that is dangerous to herself and whatever you have in that room. If she is the kind to throw a tantrum when you stop her from playing or even the offending activity, then let her have her tantrum, but you don't throw one with her. You be very quiet, calm, even open up a book or magazine to show her that you are not listening to her, and you are going to peacefully read, sew, whatever until she stops. This might be unnerving at first, but it really will work. After all, why throw a screaming fit, if nobody is going to watch, right? I don't know if my kids were typical two year olds or not, but we went through the hitting, biting, mouthing off, etc. and now both of my girls are a wonderful 8 and 12 year old that are a joy to have around. Don't worry about what other mothers think. If they don't want to bring their children over to play, don't worry about it. She will learn more by playing with you at this age anyway. We learned our social skills from the adults in our lives, NOT from the other children, and now is a good time to teach those skills. Then, when she enters school or your local homeschool group (whatever you choose), she will enjoy being around other adults and children, and they will enjoy being around her. Be patient, Mama....there's more to come, but they don't stay babies for long.