Re: How do you make a Potato Clock??

The potato clock uses two potatoes with different electrodes as batteries that power a clock:

You can buy kits for about $20:
Yahoo Shopping - 2 potato clock
or
Treasure kids 2 potato clock

...or, you can try to make one  yourself based on these instructions:
Instructions for a potato clock
or this set of instructions:
Potato clock instructions

See you later, electric tater!