use Google as a timer

Did you know that the Google search box can be used as a timer.  All you need you need to do is type in "set time for ___" filling in the blank with how long you want the timer to run for.  Press the start button and go about your business.  Make sure your leave the tab open with the timer in it and that they sound on your computer is one.  Once the time is up the timer will beep.
Watch this short video to see how it work.

 

What fun timers do you use in your classroom?  During what activities is a timer most valuable?