We attended a music concert for kids on the weekend and DS6 kept scowling at and making comments to a little girl sitting behind him who was being pretty disruptive.

It dawned on me that this is probably how he behaves with other kids all the time. If that's the case, he is going to have a tough time with friendships! We've tried to remind him that he can be the disruptive one when he's bored with something, we've also pointed it out to him when it's happening, and we've reminded him that he needs to be more patient with others (because he his being rude to others and his friendships could suffer otherwise). But nothing seems to sink in.

I realize that this is probably related to his intensity and potential/likely OEs, but I'm at a loss as to what to do about it. Any ideas?