First I’ll tell you why it’s awesome, then I’ll tell you what it is.
1) Group Size is Flexible. You can play with 4 or 400 (but if you have 400 you’ll need a big field).
2) Player Size Is Irrelevant. I’m pretty good at this game, but one of our 8th graders who is half my height and weight can easily hold his own when I’m defending him; Unlike Basketball where I dominate 8th graders 
3) Necessary Skill Level is Flexible. It takes one game to become proficient enough to participate. I’ve never met anyone who couldn’t pick the game up in a few minutes. However, that doesn’t mean the more athletic teens get left out. If a person can run, knows how to watch a field, and can find holes in a defense, then there’s plenty of opportunity for them to be brilliant.
The name of the game: Ultimate Frisbee.
