We love glass stones, or as we call them "Dragon Tears". You can find them in the floral section and we get them at the Dollar Tree. Sometimes I bury them in the sandbox for the kids to discover, sometimes in a tub of water and they are fun to use in play dough too!
I made up these cards by cutting out cereal and other food boxes. Then I wrote shapes and letters on them. The kids placed the dragon tears on the lines, encouraging fine motor and letter recognition skills.
I also put out ice cube trays for the kids to sort them into. They would count, sort and then dump them out and start over.
I would love to know how you all use these pretty little glass stones.