During play type "CHEATERCHEATERWIMP" for $50,000,000.
Try clicking on the stadium once it has been built, you should see an amusing message.
Here are a few special dates that occur during the game:
April 5th/6th ------- Birds migrate north
July 7th ------------ UFO flies from northeast to the south
Saturdays in August - Amusement park fireworks show at 8pm
October 1st/2nd ----- Birds migrate south
December 24th/25th -- Santa rides his sled from north to south (10pm-1am)