I found a totally nerdy game that I wish I was better at. It shows you a few letters in different fonts, and you have to "shoot" the correct one. I'm pretty decent at the fonts that come default with Word, but... Clarendon Light, Bliss Light?
Another cool, yet nerdy font thing that I enjoy... Kinetic Typography. There are a bunch of videos on YouTube if you search for that... This is one of my favorites.