Cooked Play Clay 1 cup all-purpose flour 1 cup water 2 teaspoons cream of tartar 1/4 cup salt 1 tablespoon vegetable oil Food coloring Wax paper In a medium-size saucepan, mix all ingredients. Cook over medium heat, stirring constantly. When dough becomes harder to stir and gathers on spoon (about 5 minutes), dump onto wax paper, cool until able to handle and knead 10 to 15 times until smooth. Store in sealed container, keeps up to two weeks.