You crazy duck. :U

XD Fun. I have never made up a fun game...... :( But I randomly create words and odd little dances.

My lil sister and I are together almost all the time. Whenever bored of waiting we eventually find something to do together to pass the time. For example, we used to love naming states, pokemon (in alphabetical order), etc.
I remember creating a game with a piece of paper and pennies... don't know how to play it anymore.
I don't think we have enough creativity for made up games though. We did start a game based on improv by having a situation and creating dialogues in alphabetical order ^o^

My friends and i have created a whole host of games over the years. in fact recently we invented an event to encorporate all our games. "T3 Games" it's called (thats Table Top Tornament) it includes Pencil potting and a whole heap of other games to boot.

Otherwise i also enjoy teaching people to play cards. Those are games that already exist though.