Best Birthday Ever: Dream Theme

To have the best birthday party ever, you need a good theme.  Last year, I had a soccer and olympic challenge theme.  This year my theme is Survivor Kids.  My friends and I are going to make up two tribes: Cumpleanos Tribe and Geburtstag Tribe.  We are going to have luxury and immunity challenges.  After the immunity challenges, someone will get voted off until we merge into a single tribe and then have a sole survivor.

Themes have to be fun and not too complicated.  You need to make sure they're not too babyish or anything.  That's the worst when a party is Dora the Explorer or Clifford the Big Red Dog or Bob the Builder or something like that and the kids are just too old to think that's cool.