Cornstarch
Water
Food coloring
Cold cream
Muffin tin

1. In each cup of the muffin tin, mix 1 teaspoon cornstarch, 1/2 teaspoon water, 1/2 teaspoon cold cream and a couple of drops of food coloring. A different color for each cup. Stir.

2. You're ready! See if you can get your grown-up assistant to sit still and let you practice.