Introducing an amazing project that I've heard of for years but never "had the time" to do anything with.
I create a flipchart of images and videos that I thought were really informative and inspiring. You can also do a lot of google searches, but this kept us on tract and left plenty of time for the students to get started on their doodles.
You CAN teach this as a lesson and actually have the students submit their final drawings. I purposefully did not do that and only introduced the concept and allowed for time to begin a doodle. I did suggest the students talk with their parents if they'd like to seriously consider entering. Why not? Someone has to win!
Here are a few of the videos I found to me inspirational, as well as some of my favorite doodles though out the years: