I started time out with my son when he turned two as well. It takes a few times for them to understand it, but they learn quickly. My son is now 2 and a half and tries to give his father "two minutes" when he does something he is not supposed to do. The usual rule is to give them one minute for every year of age. When you start out with the new rules you want to give them a warning. "If you touch the computer one more time you are going in time out" And then ALWAYS follow through. When you sit him down for time out, always say, " you have two minutes time out for ......" And make them stay there and set the timer. If he gets up, you set him right back down. If he tries to talk or cry, you ignore him, and don't let others go near him or talk to him when in time out. When the timer goes off, ask if he knows why he was in time out, and explain in simple terms. Ask for an apology, if necessary and follow up with a hug and "now go play" or whatever he was doing before the incident. This works like a charm and you will notice a difference soon. The trick is to always follow through so he knows you mean what you say, and to explain, so he knows what he did is unexceptable. I hope this helps! H.