Vik muniz is a extremely fun artist with some bewildering projects. The picture above is him drawing clouds in the sky, with those exhaust stunt planes. He's got drawings made from wires, finger paintings using sugar, crop drawings from the sky, and a bunch of other projects that just make you smile. I first met him at the TED conference and have been following his work since. Go to his pages and listern to his commentaries about his work.