In a large mixing bowl, combine the flour, salt, and cream of tartar.
Add the coconut oil and mix well.
Pour the mixture into a saucepan and add the warm water.
Add a few drops of red food coloring to make the apple playdough. Add green food coloring if you are making the green apple playdough. Add brown food coloring if you are making the cinnamon playdough.
Cook the mixture over low heat, stirring continuously, until the mixture is no longer wet and looks doughy.
Remove the dough from the saucepan. Knead it with your hands until smooth.
Store the playdough in an airtight container for up to three days.