Color Changing Milk Experiment! Watch the magic happen with this color changing milk experiment by mixing milk, food coloring and dish soap. The kids will want to do this experiment over and over again. The first time we used pipettes to drop the dish soap in. The second time we used q-tips dipped in dish soap. The third time we used a cotton ball dipped in dish soap. This is a great activity to talk about cause and effect. AGES 2+Join our mailing list for access to our FREE printables and activities for kids sent right to your inbox!