Why no art therapy? I can understand that maybe you wouldn't want to give him things that are fragile or dangerous; but anybody can slap finger paint onto paper or squish clay. Maybe he could do some things that have a low frustration potential, like splattering paint onto paper Jackson-Pollock style.

I think he probably has a lot of trouble dealing with his impulses; is that true? He just does things before he can think about them enough to stop himself. Maybe you could teach him how to stop before he does something. Teach him when he's calm and listening carefully. Maybe you could teach him how to ask himself, "If I do this, what will happen?" He's still so very young, and it'll probably take him a while to catch on. Don't punish him when he doesn't manage it. But the easiest situations, the lowest-stress ones, the ones where he's just on the edge of learning how to inhibit his impulses, maybe he could start with those. When he messes up, maybe you could go over the incident with him and try to figure out what the best way to deal with it would have been--whether he could predict it and stop it himself, or ask you for help, or whether it was just too sudden and better to wait it out.

It's weird that he's only on meds. I don't like antipsychotics personally, but I admit they can be helpful sometimes. It's just that it seems like it doesn't make sense that they would just put him on meds without also teaching him those crucial new skills that would be so useful to him.

He obviously knows that he's hurting himself and others when he acts impulsively; otherwise, he wouldn't cry when he messed up. Talk to him, tell him you're going to find someone to teach him how not to do that stuff, how to control himself and think before he does things. I don't know how much he'll understand, but the important thing is to make it clear that he is not powerless or defective, that he can learn, that you're behind him all the way.