Graphic Designer and Illustrator David Laferriere has been drawing on his kids’ sandwich bags with a Sharpie marker every day since 2008. From his Flickr account:
"Each drawing is done just after I make the sandwich. I take a picture and post to flickr. My kids don't see the drawing until it is lunchtime. The challenges are coming up with an idea and then drawing quickly and directly on the bag, every line counts."
Check out more on his Flickr account here!