Flavored Play Dough Keep it in a plastic container with a lid between uses, and it lasts forever. 1 cup sifted flour 1/2 cup salt 3 tablespoons vegetable oil 1 small package unsweetened powdered     drink mix or Kool-Aid 1 cup boiling water Mix flour, salt, oil and drink mix or Kool-Aid®. Add boiling water. Stir together; knead mixture until it forms a soft dough.