The first person asks the second person to list three of something, the second person then lists three of those things and asks the next person to list three of something else
Eg.
Person 1: List 3 foods you couldn't live without
Person 2: -Cheese -Cake -Grapes List 3 movies you hated ...and so on
Eg.
Person 1: List 3 foods you couldn't live without
Person 2: -Cheese
-Cake
-Grapes
List 3 movies you hated
...and so on
List 3 colours that make you happy