Soccer. (maybe just because that's what I play!)
capture the flag. Soccer Basketball (Other common sports) Relays Obstacle Courses Sharks and Minnows Kickball Capture The Flag
Maryland vs Indiana
Fox Soccer Channel and Fox Soccer Plus
Mexico
basketball because it is more team inclusive and faster paced
OS boy's are better
Assuming it isn't a professional sport, really anything. You can do 3 vs. 3 whiffleball, soccer, football, basketball, street hockey, ultimate frizbee, water polo, etc
In Argentina they call it by it's correct name... Football
Mexico vs Argentina
youth wrestling
Portugal
2-1