Do you live by a beach, take vacations there, or plan on going to one this summer? If you do, you probably have a collection of sea shells you are wondering what to do with. Wonder no more! With some sand play dough, polished glass beads, and sea shells, you can make a masterpiece! By adding some sand to your no-cook play dough, you will make a substance that is soft and squishy, yet gritty, and a lot of fun for kids.