Why do you think your son is too young for timeouts??? Send him to his room. You might not call it a timeout --- but it is. I'm with your sister. Unless your son has something serious like downs syndrome --- he's older and knows better. Don't make excuses for him because he has learning disabilities. On that same note, your nephew is old enough to know better as well. He needs a timeout place as well. You need to be firm & assertive. Also, I suspect part of the problem is the video games. The kids are probably bored. They need some structured activities. This is your job. Get the kids outside doing physical activities. When inside, have them play board games or do crafts or something. Minimize the amount of time spent with video games or watching tv. Use the video games/tv as a reward at the end of the day. If they don't fight during the day, they earn tv/video game time. Create a rewards system. Each kid has a jar with marbles (or whatever filler you choose). When they have negative behavior, take a marble away. When they have positive behavior, add a marble. Set a goal for # of marbles in the jar at the end of the day. The kids who meet the goals get to watch tv/play video games. The kids who don't meet the goal miss out on the reward. At the end of the week have a super reward that you and the kids agree on. If they meet the goal, they get the reward. Have a mega reward fr the end of the month. And an extaordinary reward for the end of the summer. Kids don't magically know how to entertain themselves or interact with one another. It's your job to teach them and set an example. I am a teacher and a mom. My sons (1 & 5) have been fighting this summer as well. I find it is directly related to my behavior. When I keep them busy with activities --- they don't fight. When I'm on the computer doing what I'm doing now (for example), they're watching tv, and a fight soon breaks out. So, I'm not perfect. And my kids fight, too. If it's really driving you crazy --- it's worth the time spent organizing activities. For example, soccer, library, board games, water balloon fights, hikes, park, picnics, swimming pool, biking, skateboarding, golf, frisbee, sidewalk chalk, bubbles, tennis, baseball, etc. Also, have them wash your car, help clean the house, help take care of the yard, etc.