Looking for a fun and free way to test your family’s geography knowledge?  Check out City Guesser. Created by teen web developer Paul McBurney Jr., the website shows screen clips of strolls in world cities, but without identifying them. The object of the game is to use clues seen in the videos to guess which cities they were filmed in.  If you think you know you can “Start Guessing” and pin your guess on a world map.  The map is rather vague though.  If your guess comes within one mile of the actual site, virtual confetti drops. If the guess is off by more than that, the game reveals how much. The game has a library of some 600 clips (the 2^nd one we tried was easy…the Penn campus in Philadelphia!), and you can choose to watch videos from walks around the world (most challenging) to videos that only show monuments, or you can narrow down to distinct regions or countries.