Brought to you by the fine people at the Art House Co-op, the Sketchbook Project incorporates the art of more than 2,500 participants and is currently on tour in a city near you. A simple concept that has rendered amazing results and an awesome exhibition. Art House sent out sketchbooks to artists from all over the world, they made art and sent the book back. Today in Philadelphia, then Boston, Chicago, St. Louis, Brooklyn and Atlanta (click for location and times). If you can't make the show, there's over 3,500 photos available online.