1. Carefully pour some milk in a dish so it just covers the bottom. 2. Gently add one or two drops of red, blue, and yellow food coloring to the same spot in the center of the milk. 3. Dip a cotton ...

Add enough water to a paper plate to cover the bottom of the plate. Add 1 drop of blue food coloring near the center of the plate. Add 1 drop of yellow food coloring next to the drop of blue food ...