Reverse Graffitti Artist Alexandre Orion

While in New York, Amber and I went to the Museum of Arts & Design (MAD) and saw an exhibition entitled "Blown Away."  All works in the exhbition were created using dirt, dust, and/or ash.  There was a video of Alexandre Orion's work.  I've included the video and 3 images below. This artist's big ideas and images could easily be used at the elementary level.  Pretty amazing!
http://alexandreorion.com/ossario/video.html