Pour about one tablespoon of dish soap into a small container.
Pour milk onto a plate. (It’s ok if you see bubbles.)
Drip a few drops of food coloring of choice in the center of the milk. You can get creative with where you drop the drops and space them out how you wish. (Note: Food coloring may spread out slightly as pictured.)
Dip a cotton swab into the dish soap.
Place the cotton swab in the middle of the colors and watch what happens! You should see the colors start to spread out towards the sides of the plate and change over time. You can repeat this step a few times.
Tip: Kids can take their cotton swab and “draw” or “swirl” in the colors. Eventually the colors will mix together until the milk becomes one color.
If you allow the milk to sit a while before all colors are mixed completely together, you can see the milk change in neat ways as pictured here.