This Exquisite Forest Project

This Exquisite Forest is an online collaborative project that lets users create animations on a specific theme that build off one another. The project was conceived by Chris Milk and Aaron Koblin, and produced by Google and Tate.
One of the coolest parts about it is that users contribute using only a Chrome browser. The site was constructed using Google Chrome’s HTML5, as well as Google App Engine and Google Cloud Storage.
There will be a physical installation of the project at the Tate modern in London for the next 6 months.