Pour 1 cup of milk into the bowl.
Add 3 drops of red food color to one edge of the bowl.
Add 3 drops of blue food color 1/3 of the way away.
Add 3 drops of the yellow food color 1/3 of the way away.
Don't mix of jiggle the bowl.
Squeeze a drop of the dish soap in the center of the bowl.
Watch what happens!
The dish soap does not mix with the milk. Instead, it floats on top and spreads over the surface. As it spreads, it grabs the food color of the primary colors you dropped into it. Where the color meet, the combine and form new colors. We call these colors, secondary colors!
Red + Yellow = Orange
Blue + Red = Purple
Yellow + Blue = Green