Our experiment came from an excellent science resource filled with tons of friendly information and awesome experiments:
Our project consisted of seeing emulsification in action. We used milk as suggested because it contains fats and proteins in solution. The following materials are needed:
(cups, detergent, food coloring, milk)
We placed about 1/4 cup of milk in a cup, added a small spoonful of detergent to bring the substances that are normally not soluble together. We jotted our observations. It was still difficult to "see" the fats/proteins clumped together. We then added the food coloring and we saw the explosion of colors. It was then much easier to observe the fats/proteins in the milk. We discussed that because bile emulsifies fats, bringing them together with water, this makes it much easier for enzymes to get at the fats/proteins and break them down even further in the small intestine.