text: First off you need to ask yourself "Is this behavior that I have made acceptable view of in my house?"  Kids learn by seeing alot of the time.  Secondly remember that the years 2 & 3 are when children start to assert their independence hence the Terrible Twos.  If it is truly violent behavior do not answer in kind.  The calmer more rational you are the more calm your cild will be.  The energy you would have fed to the situation with anger is not there and it makes the situation smoother.  Now if it is simply taking toys from other children not sharing, biting, etc These are normal things that 3 year olds do.  My son bit a child at school until he broke the skin but the child smaked a toy from his hands very crudely.  And he answered back.  \n\nRemember to break down their behavior slowly and do not try to deconstruct them psychologically.  They are not old enough yet to have severe trauma unless their background dictates it.  Get on your 3 year olds level and speak in small concise words so that he can follow your meaning easier.  Encourage him to express feeling of anger or hurt verbally rather than physically.  When one of my boys has a problem or is upset, I ask "Does this make you mad, it's okay sometimes to be upset."  Help them get an outlet and redirect that energy into playing with another item etc.  \n\nI Hope This Helps,\nAmy