Browser Ball
http://experiments.instrum3nt.com/markmahoney/ball/

Browser Ball attempts, with only moderate success, to allow the configuration of a seemingly endless array of continuous spaces using multiple overlapping browser windows. Within this multivariate space, users are invited to toss a beach ball both hither and yon. If this sounds like a ridiculous use of everyone's time, that's only because it is.

cool infographic on world cup ball

A look at game balls from 1930 to 2010.