Cornstarch
Food coloring
Water
Cold cream
Muffin tin

In each cup of muffin tin, mix 1 teaspoon cornstarch, 1/2 teaspoon water, 1/2 teaspoon cold cream and 2 or 3 drops food coloring, a different color in each cup. Stir. Use small paint brush or make up brush. Now find a face you can practice on.