In a plastic bowl, whisk together flour, salt, and cream of tartar.
Make a well in the center of the bowl and add vegetable oil, boiling water and food coloring.
Using a rubber spatula, stir until a dough forms, add a little bit more flour if needed. (It's ok to add in more food coloring at this point if needed just be sure to really work it into the dough)
When the dough is cool enough to touch, use your hands to further incorporate the flour and knead until all flour in incorporated and dough is soft and uniform in color.( wear latex gloves if desired)
Let playdough cool completely before playing with it.
When you are ready to play with the playdough, wash your hands and have fun!
Store the playdough in a sandwich bag and place the sandwich bags in an air-tight food storage container. Store room temperature, no need to refridgerate.