Making Playdough in Ganon Aleph

Thank you to Eli's mom who came to our class to make playdough with the children.  They each took some home in a little zip-loc bag! 
Here is the recipe in case you want to try this at home:
(Use this amount for each color)
1 cup flour
1/3 cup salt
2 tsp. cream of tartar
1 tbsp. vegetable oil
1 cup water
food coloring
Mix and cook over low heat.  Keep stirring until smooth.