I had nearly forgotten my extreme fondness for Mad Libs, which was cultivated during field tips in my early childhood, and then calamari alerted me to the fact that you can play them online!
In case you missed out, Mad Libs is a word game where one player prompts another for a list of words to substitute for blanks in a story, what results is a hilarious, and often nonsensical, story that is best read aloud.
If you want to play online there's an official site with three options and a non-official site, which is user generated and has 155 to choose. Both are hilarious, geeky and another great way to waste a couple of hours at the office.
To quote calamari: This is awesome, I'm totally 9 years old again.