Color theory disguised as a treasure box

2nd graders have been talking about the elements of art (line, color, shape, texture, form, and value). They used flat popsicle sticks to create the shape of a square, then built upwards to form a cube.  When their boxes were ready to paint, they were given only primary colors (red, yellow, blue) plus white, and used them to mix the rainbow of colors that you see here.