It's got wheels, is cool, and would really liven up a block party

It takes 13 operators, cost 1.8 million British pounds, and was a street art piece by the French group La Machine, who were recognized for their earlier work, the Sultan's Elephant.

For a gallery: http://www.boston.com/bigpicture/2009/02/la_princesse_in_liverpool

and a better gallery http://www.lamachine.co.uk/index.php/gallery/