I love this method! There are so many options up to you.
I take pictures out of storybooks. Right now I'm working on the Lorax. I copy the page out of the book. I'll either tape it to the window and then lay my fabric over top and trace everythin I want to use in perm marker. Or stick the picture under the Tracer and blow it up on a wall where the fabric is hanging. The trick is knowing which pages to use and which ones not to so you can tell an effective story.
I have one iron that I keep for this job only.