Allan Kaprow, Playing the City, 2009 Allan Kaprow explained: "A Happening is a game, an adventure, a number of activities engaged in by participants for the sake of playing." He didn't call this event "Playing the City" for nothing. Building walls with melting ice blocks is an activity that's removed from everyday, ordinary life and therefore a form of play, similar to building a sand castle. Using ice blocks shows the inventiveness and creativity of the artist; the video clearly shows the beauty of the work of "PlayArt".