If you have a school fund-raising event (i.e. bake sale, BBQ), these are great to sell, and fun for the kids to make. We use ours as good luck charms, but they can be used as "worry stones" for children with anxiety as well. I had a teacher tell me that she used to make these, and give one to each of her students at the beginning of the year.
SEE THE DETAILS HERE: [ Happyhooligans.ca Link ]