Water beads are a great sensory activity. Kids love them, adults love them. But, what to do if you have a child who puts everything in their mouth? They’re supposed to be non-toxic but they are a choking hazard. Well here you go, safe, edible, non-choking water beads:
http://www.funathomewithkids.com/2013/10/safe-edible-non-chokable-mini-water.html