This student may have some sort of sensory issues. Have you tried a weighted blanket or weighted stuffed animal to see if that might help him stay calmer. Or maybe a special cushion to sit on to give him more wiggle opportunity when he sits. Do you have assistants in the room who might be able to help by reinforcing his “good” moments, and help him learn to understand the classroom expectations, and to help him comply? Could someone take him for a walk once or twice a day, to help him decompress and talk to him about how to make friends by keeping his hands to himself? Play doh sounds good, and maybe playing at a water table if you have one. If he has any trouble communicating or listening, picture cues might help. Good luck!