I stumbled across these watches today. These might be old hat to some but I thought it was worth sharing. I think they work like a chrono - push the button and the 'meter' runs through from 0 to 60. It would be even better if you could add minutes to the 'meter' e.g. press the button 20 times to add 20 minutes to the meter, which then ran down to zero. But either way, I thought they were quite cool.