Our 10 year old has had some african drumming last year in school and quite liked it. Was not so much musical therapy, more as a part of OT. He usually flaps his hands a lot when excited, and doing similar movements in a control manner helped him to some extent to be more aware of it. Not that he stopped flapping, of course, but can limit it a bit when in school.
He now has a hand drum at home since Xmas to play it whenever he feels like it, but has not shown much enthusiasm. Of course after several hours it takes him to finish homework every afternoon, he’s too stressed for anything else but Playstation.