Separate Skittles into groups by color.
Next, arrange Skittles in a design on a white plate.
Pour warm water onto the plate, just enough so that all of the candies are in the water, but taking care not to overflow the plate.
Watch as the color from the Skittles begins to bleed and fill the plate with color.
Ask kids to write down what they observe. Do the colors mingle? Etc.
Skittles Experiment: Exploring Color Science https://thesoccermomblog.com/skittles-science-experiment/