The first person picks a word, then the next person picks a word that's related to the previous word and you keep going down the line.
For instance:
person #1 - cow
person #2 - milk
person #3 - white
person #4 - snow
...etc
Alright, so I'll start.
Moon
–Edward Elric~ talking to Roy in a car one afternoon in a long drive..Fullmetal Alchemist

