Tres magnifique! If you are bored at work here is some inspiration: Simply decorate the windows of your office building with pictures of your favorite animated characters.
The employees at Ubisoft Montreuil in France did exactly that. In a counterstrike the staff over at the BNP bank across the street started to return the favor. And there you have it: the Great French Post-it Battle. Perhaps the beginning of a new tradition. (Thx to Tom for the heads up.)