-Watercolor liquid paint or food coloring
Place smocks on children because things could get messy!
Place a large pile of shaving cream in front of student and allow them to choose the color they want. (They can choose as many colors as they want)
Hand them a Popsicle stick to mix the colors and spread shaving cream. They can also use this as a writing instrument.
Students can use hands to play and experiment mixing colors with friends as well!