In this chemistry activity, learners prepare two petri dishes, one filled with water and one filled with milk. Using food coloring and soap, they discover that milk is an emulsion, a special mixture of fats and water, two items that are not very soluble. While the food color is initially not very soluble in milk, the soap reduces the surface tension and allows the color to swirl and mix. A simple experiment that entertains young learners, but easily extends to older learners. This activity is currently used in the Everyday Chemistry Unit in OMSI's Chemistry Lab. Cost estimates are per 100 learners.