Green Science Potato Clock
  Be a scientist as you discover how to power this digital clock using...potatoes! You may know potatoes as a great source of potassium, but did you know they can be used to power an alarm clock? Try various experiments to find out what other substances will power the clock - you'll be amazed!This kit contains a digital clock, detailed instructions, and everything you need (minus the spuds) to run it.Part of the Green Science range from 4M and Kidzlabs.