I came across this fantastic video (via Geek Mom) of artist Bashir Sultani creating an image of Yoda out of nothing but table salt.
httpv://www.youtube.com/watch?v=xwyR0sSIODc&feature=player_embedded
The artist has his own YouTube channel where you can also see videos of him creating Batman, Avatar, Sonic the Hedgehog, and Elder Scrolls v Skyrim:
httpv://www.youtube.com/watch?v=hHkJt2ZAwyI&feature=channel_video_title
Again, absolutely incredible. Check it out!