I had a thought for a game using wikipedia. You start at a given page and by clicking on links in the page you try to navigate to a completely unrelated page. You must stay in wikipedia, you can't type, or select and search, or cut and paste. You can only use hyperlinks to another wikipedia page.
Open the links in new tabs and make a screen shot of your tabs. Whoever has the fewest tabs to get to the destination page wins. You cannot go backwards.
First pair: Start at
http://en.wikipedia.org/wiki/Arthur_Conan_Doyle
and try to get to
http://en.wikipedia.org/wiki/Obsidian
Might be fun.