Mix together in a heavy saucepan:
1 cup of flour
1/2 cup cream of tartar
Add 1 cup of water and 2 T cooking oil
Stir while cooking over medium heat until it sticks together in a ball and looks like stiff mashed potatoes, 3-5 min. Dump onto a plate to cool a few minutes and then knead into the clay about 1 or 2 cups of flour. Store in a plastic bag (no need to refrigerate).