Home Make Play Dough by Sharon Tan
1 cup flour
1 cup water
2 teaspoon cream of tartar
1/3 cup salt
1 tablespoon vegetable oil
Mix together all the ingredients, except the food coloring, in a saucepan. Cook over low/medium heat, stirring. Once it begins to thicken, add the food coloring. Continue stirring until the mixture is much thicker and begins to gather around the spoon.
Remove the dough onto wax paper or a plate to cool.
Recipe from http://musingssahm.com/2012/
(Step-by-step pictures and instructions can be found in the above link)