Spread the flour on a baking sheet and bake it in the oven at 350°F for 5 minutes to kill any harmful bacteria. (If you don't need the moon sand to be taste-safe, you can skip this step.)
Use a toothpick, a popsicle stick or the handle of a small spoon to mix some candy coloring into the oil.
Pour the oil into the flour and stir until combined, making sure to break up any clumps. The mixture should hold its shape when pressed into a ball. To make several colors, repeat the previous steps as needed using different colors of candy coloring.
