online graffiti art

I'm sure I'm not the only one who has students with a penchant for graffiti art. The question is, where can they do it without defacing someone else's property? Well, here's your temporary answer: graffiti/playdo. This site has private walls and public ones. The public ones have multiple "artists" mastering their skills. Well, sort of. In any case, it's fun. -rey rey