Paint By Numbers Illustration. You might get a bit of a surprise if you paint the picture*. Download a hi-res PDF HERE and have fun, (and of course send me a picture of the results!).
NOTE: You will have to mix your own colors, use the swatches at the bottom as a guide, but feel free to experiment with different palettes. I recommend acrylics or tempera, but anything opaque will work.
*If you're impatient you can cheat and see the end result HERE.
UPDATE: Since B.B.B. asked, the way I made this was to start with a photograph which I brought into Photoshop, I used the Cutout filter to reduce the number of colors and simplify the art. Then I brought the image into Illustrator where I traced each shape (and further reduced the numbers of colors), putting each color on its own layer. After adjusting the image in color, I changed all of the shapes to white with the blue outline and added the numbers, using the layers to help me keep them straight.