For my 13th bday party, I had about 9 friends over to play Whirley Ball. At most places you can only have ten perople play at a time (and its not fun if you have more than ten because you have to switch out players). Whirley Ball is where you're on bumper cars and you have a lacrosse stick and you have 5 players on each tteam. You try to throw the whiffle ball with your stick to your teammates and hit the board to get a point. It was fun because everyone was laughing so hard because everyone was messing up and stuff! It was hilarious though! We went home and spent the night at my house after that. It was a blast!