A game! Just like when you were in the car as a little kid, I'm going to think of something and you get to guess what it is! Instead of animal/vegetable/mineral, we'll play object/scene/character.
If you didn't grow up with 20 Questions, it's pretty self-explanatory. You get to ask 20 yes/no questions and I'll answer them. You can guess what I'm thinking of at any point.
You should also feel free to think of something yourself and start a new comment thread that starts "See if you can guess what I'm thinking of..."
Somewhere after hour two of CAP, they played this all the time! :)