In David's own words:
So what's in this for teachers? I can imagine a similar activity as a neat cross-grades project, with a kindergartener drawing the original image, a fourth or fifth grader writer an accompanying story (perhaps as the kindergartener dictates it), and a high schooler creating the finished image.
For inspiration, check out David Devries' site, where he discusses the project, shows off more examples of his work, and offers a number of school presentation options. You can also get your hands on David's recently published The Monster Engine Book. That book, plus the video below, can serve as great models for getting your own project underway.
Thanks to Picture Books Anonymous for bringing this site to my attention!