Rat, this is awesome you are getting organized. For Bball when other team is introduced, hold up newspapers like reading them and not paying attention - after each player's name is announced yell "who cares", "too short", "big deal", "overrated" etc. in unison. When the coaches name is announced, yell "get a job". When handing out newspapers before game, hand out a small sheet listing the order of the yells.