Julien Moise has designed a watch called Eole that displays time when you want to see it. This watch uses wind to produce just enough energy to display the time, and then the screen goes dark, but the watch keeps keeping time for you…Just blow at your watch and it will display the accurate time.
The watch has a fan around it which needs to spin so that enough electricity can be generated to display time. It also has a weather indicator and alarm function. > Via