This awesome bamboo soil clock comes to us from Dutch designer Marieke Staps, and all it asks for from you is two potted plants and some moisture. The designer says that the biological processes in the soil produce enough bacteria to power the clock. We have to wonder if it’s the plants providing these processes, or the dirt itself. Because we can think of some people who would kill those plants within days, but watering pots of dirt would probably be possible. Regardless, Inhabitat (which sells the clock in their store) says that you can use any two plants to provide electricity for this super-cool clock.