The first step was to apply a "photocopy" filter to the original photograph in Photoshop. I then increased the contrast and lightened the image to create a cartoony (coloring-book) effect. I up-sampled this image to something like 45"x60", then exported to Illustrator. I adjusted the document format to tile the image onto 40 sheets of paper, and then printed directly from Illustrator onto card stock. We then passed the pages around the family, with the instructions to be a little creative. After they were all colored (or painted, etc.), I scanned them back into Photoshop and reassembled the image.