The game 6 Degrees of Wikipedia game has been around for quite a few years. Its a fun way to see who the best "searcher" in your class.
Give your students a random Wikipedia page to go to i.e. Butterflies and then by ONLY using links on the page can the jump for page to page and get to another random page such as the game Monopoly.
Below is an example.
Butterfly ► Old English ► England ► Industrial Revolution ► Monopolies ► Monoply the game
Challenge your kids to see who can get from one item to another with either the fastest time or the least number of clicks
If you are needing some inspiration and ideas of how to find two totally random entries, try this site:
Here you can click on one of their many random generators to get things like:
I usually have candy for the fastest 5 people or so to get from point A to point B