Sort the Skittles into color groups—red, orange, yellow, green, purple, and blue. You'll need Wild Berry Skittles for the blue.

Place the Skittles on the plate in a color wheel pattern, like spokes of a bicycle, with each color pointing toward the center. Use rainbow order for the best visual.

Slowly pour warm water into the middle of the plate. Add just enough so the water reaches the base of the Skittles without covering them completely.

Watch as the colors begin to dissolve and spread toward the center, creating a swirling rainbow display.

Ask your child what they see happening. What colors are mixing? How do primary colors combine to make new ones?