I have made fidgety blankets for persons with dimenthia, all it is small blanket made from fleece, you can attach various pieces of fabric, pockets with snaps to open and close the pocket, zippers that they can fiddle with, buttons that he can undo and do up, I have also added wool that has been braided, short ribbons that can be threaded thru like shoe laces, and a variety of other things can be done to his blanket to keep him occupied and engaged for some time. You would clip the edges of the blanket to make a fringe, and then run a stitching line around to keep it from being torn. (You could visit your local second hand shop and pick up shirts with pockets, some with zippers, some with snaps, some with buttons, and just stitch these pockets onto the blanket). Stitch elastic about 3 inches long, and attach a small stuffed animal to the elastic, put a small hole in the blanket and then they can push the stuffy thru the hole from the front and the back of the blanket.....and probably there is a variety of other things you can think of.