Scavenger hunts were originally a kid's party game, but they're now major social events for everyone from 5 to 95. The adult versions are more complex, but they're basically the same thing. In some clubs and colleges, scavenger hunts can get pretty wild.
The idea of scavenger hunts is to find everything on a list. That means that the things on the list are usually at least slightly difficult to find. That does add a lot of fun to the game, and if people start getting creative with the items on the list, it can be hilarious.
Kid's scavenger hunt example
A typical young kids game list would be: