Help! nephew gone crazy?

Try putting him in a time out whenever he does it. He is two years old, and most likely, he will have gotten past this stage when he starts school. If there is something he really likes (like tv) then punish him by taking it away. There are others ways to discipline a child other than . Don't worry. You probably haven't ruined him! Two years olds tend to act up. That is why they are called the terrible twos!