During free time, a common place of a more simpler form of play is the gym where kids can play basketball, ping pong, air hockey, foosball, and a game local media believes is called "Carpetball" involving pool balls that you try to roll down a long strip of carpet and knock your opponent's balls into their tray.
Josh Williams, who was on a great winning streak, can be seen here sending his shot down table towards his opponent's balls.
Video Link: Carpetball with Joshua