I've been toying with the idea for a while. I have a shape that I want students to color based upon certain criteria I give them.
This time I gave them the choice of only two colors. I then let them color as they choose. I had one student ask me how to start but I gave no additional instructions. Another student said, "I messed up. Can I have another one." I refused and said to work it out. The outcome was very good.
Here are a few links to the pictures. Please forgive the quality but it is what I have.
Please comment on them as you wish.