This is my mom's play dough recipe. I've never found another one that compares.
2-1/2 cups flour
½ cup salt
1 Tbl. Alum (found with the spices)
3 Tbl. Oil
2 cups water
Place in a heavy bottom pan and cook at medium or medium/high heat. Stir until hard to stir. Knead by hand. You can add food coloring when you knead it. Store in an airtight container.I doubled it this time so it looks like a lot. It is easier to stir when you don't double it.