This is a fun project on mixing colors that I got from a workshop at our annual AEAI convention. The students begin by painting a yellow circle in the middle of their page, and then stir a little bit of red paint into it to make yellow-orange. They paint a yellow-orange ring around the yellow circle, and then keep stirring red into their paint, and keep painting larger and larger rings that are successively more red. By the time the students get to the end of the page, there is so much red in their yellow paint, that it just looks like red, not red-orange. The results are quite elegant, and most of the students really enjoyed working on this project and learning how to mix different shades of orange.