https://www.winkyboom.com/blogs/news/how-to-make-a-balloon-stress-ball
Try at weighted backpack with books or other items around the house instead of weight. On your scale at home, weight your items. Start at 5% of your students weight. Place on at least 5 - 20 minutes prior to a seat activity. Then remove for at least 2 hours. Be sure to communicate with your OT when using a weighted backpack or vest.