This is a cool game, and yes I stole it from Facepunch. :p
Basically ask how old someone was when something happened, it could be anything really. When 9/11 occurred, when Obama was elected president, when they lost their virginity, anything.
For example:
Question: How old where you when Retail Blockland was released?
Below user's answer: 12
Then the below user asks a question.
Easy!
I'll start:
How old were you when you had your first kiss?