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Lemon Clock Mini Kit

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Discover the science behind batteries!

No batteries or power points needed - just a lemon!

How cool is that? This is how:

How does it work?  Copper plates act like the positive electrodes of a battery because they are plated with a metal which is less reactive than zinc. When the copper plates and zinc plates are inserted into the lemon, a chemical reaction takes place. Electrons (extremely small particles with negative charge) move from the zinc plates to the copper plates to form a current, thus activating the LCD watch.

The lemon juice helps to conduct electricity. You can replace the lemon with a potato, a grapefruit or use soft drinks and see what effect they have.

  • Put some zing in the old tick tock with a lemon powered clock!
  • Suitable for ages 5+
  • An initiative of the Committee for the use of Citrus in Science 
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