How to Make It
Combine 1/3 cup of the coconut oil, 1/4 cup of the water, and red sprinkles in a medium-size microwavable bowl, and microwave on HIGH 30 seconds. Whisk until ingredients are well incorporated. Add 2 teaspoons of the xanthan gum, and whisk until mixture begins to solidify. Add 1 cup of the powdered sugar and 1 tablespoon of the cornstarch. Using a spatula, stir until combined and mixture begins to form a “glob.” Gradually add 1 1/2 to 2 cups of the powdered sugar and 1 to 2 tablespoons of the cornstarch, stirring to combine until mixture is solid and stretchy.
Transfer slime to a clean work surface, and knead slime, sprinkling with additional powdered sugar as necessary, until most of the oil is absorbed and mixture is less sticky. (If slime starts to get too sticky, lightly roll slime in 1/4 to 1/2 cup of the powdered sugar.) Sprinkle with 1/2 teaspoon of the glitter dust, and knead to incorporate.
Repeat steps 1 and 2 once with blue sprinkles to create blue slime, and a second time with yellow sprinkles to create yellow slime.
Roll slimes into each of 3 long ropes, and braid ropes together. Knead braided slime together to incorporate colors. When ready to store, roll the slime in additional powdered sugar, and place in an airtight container.