I'm looking for an online hour-glass timer

Hi there

I'm looking to do an end of term quiz with my first year language class. It's going to be a charades/pitctionary style game with vocabulary and I was wondering if anyone knew where I could find an online hour glass style feature, where I could just click it and it would count down, say, a minute?

Alternatively, can anyone think of anything just as good? I will be putting it up on the data projector for all to see, so I was trying to think of something more fun and innovative than just timing them off my watch for a minute.

Thanks