Remember those storytelling games that involve one person saying a sentence and another person adding onto it? Well, that is the premise of This Exquisite Forest, an art experiment created by Google and Tate Modern London Gallery.

This Exquisite Forest is a project that invites Google Chrome users to collaborate, via an online drawing tool, to create stories and animated art. A team of seven artists -- including Dryden Goodwin, Raqib Shaw and Julian Opie, among others -- from Tate Modern have put up "seed trees" to get the process going. Online visitors can now add their own drawings and stories to extend the trees, essentially helping the story/art branch out into a bigger tree. As Popsop puts it, "The more sequences are added, the bigger the trees grow."

To see what online users come up with, visit Tate Modern Gallery where, beginning July 23, Google will put up an interactive installation to feature what the Tate artists and web participants have made.