This project was done a couple of months ago, but it turned out wonderfully.
Each child had a 9" x 9" square, we folded it twice to make 4 squares and then we added rings of color with oil pastels. All different colors. We started with the biggest ring and then drew smaller ones until we couldn't anymore.
Then we filled in the "white rings" with chalk pastel all different colors.
When we were done we glued down each individual finished drawing on a large sheet of bulletin board construction paper.