This is one of my favorite activities from the “Kitchen Science” series I do at the Museum. It’s super easy and has instant gratification.
Pour some milk to cover the bottom of a shallow plate (I use pie plates)
Place 3 or 4 drops of food coloring in the milk. Don’t mix.
Dip a toothpick into some dish soap.
Gently touch the toothpick to the surface of the milk and/or your drops of color.
Like, wow, man. The colors..!