The Guess-the-Google is fantastic. We all know the Google feature of searching for visuals by entering a certain search term. Now this site turns it around. It shows 20 images and you have to guess, which search term produced these images. I had an easy start. All 20 images showed maps. So I entered map and voila. But the rest of the game was in parts rather difficult.
And, turned around again – you can enter a term, and the google montage tool gives you a nice collage of images relating to whatever you entered: