You all have seen this photo - well maybe. It's Yayoi Kusama's Obliteration Room. Back in December, over a two week period of time, thousand of people, both young and old, visited the Queensland Gallery of Modern Art. They entered a completely white room (white walls and white decor). They were given stickers and the only rule was to put the stickers where ever they wanted. Yayoi created the concept and the people were part of the amazing collaboration.
Here is the video which is pretty fun to watch. I think it would be great to do a collaboration with an artist as a team building for a group. Once done, have your masterpiece hanging in the office for all to see. Everyday you walk by, you will see how you worked together to create magic.