Actually, there is no prize. But if you are a child, or have children, you can download or print the postcard size full image, and color away. You can do an e-version in Microsoft Paint or some other app, and email your result to the address on the sidebar.
Submissions from city employees or Landform-Flaherty folks are particularly welcome. Creative emailed versions may be published in a subsequent Crabgrass post. Enjoy.