Play dough (Don't eat this one) (I gues you can if you want to)

Play dough -Heidi Pettingill
2 c. water
2 c. flour
1 c. salt
½ c. cornstarch
2 T. vegetable oil or margarine
1 T. powdered Alum
Few drops of food coloring
Mix all ingredients. Cook over medium heat until thick. Remove from pan and knead until smooth. Yield: abt. 3 cups of dough
*This play dough keeps for weeks in the refrigerator and can be used many times over.
(I don't keep it in the fridge and it still keeps well)