Don't believe what your mom has been saying all your life—there is always a place for mud in the house, especially in the bedroom (kinky). The Mud Clock is a eco-friendly clock that requires no batteries, just a little dirt and water. Stick the clock powering components in the dirt and voila—the Mud Clock is functional. Toss some seeds in the dirt to grow some maize, or something. $20.

Product Page [Via Red Ferret]