Prepare the Rainbow Cotton Pads: Use the markers to draw rainbows on the cotton pads. Experiment with different designs - some with red starting in the middle, others with red on the outside. For variety, cut the cotton pads in half and create arches with the colors in different orders.
Milk Setup: Fill a shallow dish with milk. The milk should cover the bottom completely but doesn't need to be too deep.
Dish Soap Magic: Place a few small drops of dish soap on the decorated cotton pads. This will be the catalyst for the magic to happen.
Launch the Experiment: Carefully drop the cotton pads into the milk. Try to add them around the same time to watch the colors move, swirl, and create a stunning display.