14th Birthday Party Ideas?

I'm turning 14 in June, and I don't know what I want to do for a party! I was thinking maybe like an outdoor summery theme, with a water balloon fight, and grilling out. Maybe we could have a bonfire later at night. I'm really not sure though and would consider any ideas! I'm not a girly-girl though so nothing too fancy. Also, it would be just girls. Any ideas?