This optical exploration kit includes activities to engage students in both additive and subtractive color mixing. With the color mixing box, students can control the brightness of each color light (Blue, Red, and Green) to discover how each of two or three colors add to make the rest of the colors in the rainbow. Also included is a set of 24 water color based paints for students to compare the subtractive color mixing process with that of additive process in the light box.