I came across the artist Rashad Alakbarov, who has done some amazing work using shadows.  He creates a shadow drawing on the wall using objects that can be easily found or regarded as trash.  At first look at his installation, one might be puzzled as to what it is that he's trying to portray, but once the light is on, the shadows depict a clear drawing or a message.  I'll print out some of his work for the working document wall, but I wanted to share this on here too, so you guys can enjoy more of his work and research him on your own!

http://issuu.com/phillipsdepury/docs/contemporary-art-from-azerbaijan-2012
(page 81)