Searching Katamari on Google lets you play a Katamari style game on the browser itself

[Kane99]

This is fun. If you search "Katamari" on Google, and click on the Katamari ball that shows up by the overview button, you can play an impromptu game, but on the web browser page itself. You simply use your arrow keys and move around the page collecting up images, and search results. It's a pretty nifty thing and I'm surprised it was hidden so well. Check it: 

I was probably sitting here for 20 min or so messing around with it. Check out a quick video of what I mean below: