Possible Clues:

• Banksy genre
• Public images?
• Murals and yarn bombing, e.g
• Work on the side of a building, perhaps
• Some graffiti
• Creative design class for ski racer Picabo?
• Keith Haring's "Crack is Wack" mural, e.g
• Beginning, expanded?
• Works vulnerable to rain
• Graffiti, e.g.