Each student will get a crayon today. They have to imagine all the things you can make with that color, then draw those things as best as they can on one sheet of paper. "What would your crayon like to draw?"
Thinking outside the box is one avenue to creativity. Another is problem solving. This Crayon Challenge gives students time to think and brainstorm and then draw something they want to draw within the constraints of the exercise.
Depending on time constraints, "The Day the Crayons Quit" is sometimes read at the end of this project to show the students that just because they have a purple crayon, they don't have to color grapes, plumbs and purple dragons all the time.