Joint compressions would be something to try for him, as would a weighted blanket. Something squishy to sit on at the table would be good. An exercise ball that is the right size that he can be sitting on it and reach the floor with his feet can have lots of uses. One thing I have learned through lots and lots of trial and error is that it's more than just providing the activities or the equipment for them, there has to be a lot of structure and interaction for the activity to be organizing for them. For my 5 YO we often do circuits of activity so to speak. So it's not just for her to jump on the trampoline wildly to try to get her energy out. That will be fun for awhile, but then she won't be able to stop, and pretty soon she'll be exhausted and frantically hyper jumping on the trampoline and then she'll start crashing into walls and end up collapsing into a tantrum. Instead we jump on the trampoline while singing "The Ants go Marching" or some other fun song, and then we get off and swing, and while we swing we tell a story or take turns saying words that start with B or something auditory like that, and then we do something tactile like sandbox or rice table or water play and include little figures or cars or play cooking stuff for pretend play, which then sets her up to continue the calm pretend play on her own. Another scenario is I will make up a little path through the playroom and the game is crawl through the tunnel, jump over the large block, row with the stretchy band, step up and over something, pick up a ball and throw it in the basket, bounce 3 times on the exercise ball, then go around again. Again we would do to something calm and tactile after that, maybe playdough or theraputty. I doubt it's as easy as following this exact formula or someone would have put it in a book by now but I think for most kids there are different sets of activities that help more than others.