Pumpkin Pie Playdough (not for eating)

5 1/2 cups flour
2 cups salt
8 tsp. cream of tartar
3/4 cup of oil
1 container (1.5 oz.) pumpkin pie spice
orange food coloring (2 parts yellow, 1 part red)
4 cups water

Mix all ingredients together.  Cook and stir over medium heat until all lumps are dissolved.  Knead the dough on a floured surface until smooth.  Store in an airtight container.