I have a student who has some anger issues. I bought some stress balls for him to use as needed during the day. He has used them a lot and they have been really helping him. Well last week, while he was using it appropriately, he had one explode all over him. There was white slime all over his face and eyes. So, I’m looking for for some good foam (or other material) ones that can’t explode into his eyes again. Anyone have any that kids love and that are as satisfying as the gel filled ones? Thanks!!