I have a friend who's son is ADHD, and he is the same way. I have babysat for her before, and he listened to me, but not her. I think that kids need discipline. Well when he wouldn't follow my rules, he would have consequences. I would take something away from him. I even do this with my own kids, and it works. My friends son was really well behaved with me. One thing that she has told me that works for her son is that he is really into coloring, so it might be something you might think about trying.