Pretty Polished Pennies | Experimonkey | Cool science experiments for kids


  • A Penny
  • Paper Towel
  • Water
  • A Pencil


  1. Out of your pennies, try to find the dirtiest one.

  2. Take a small piece of paper towel and dampen it slightly with water.

  3. With as much effort as you can, try for about 30 seconds to polish the penny with the paper towel. Is anything happening?

  4. Now, take the pencil's eraser and try to "erase" the patina covering the penny. What's happening now, and why?

Analysis and Conclusion

Hmm... it seems nobody's added a conclusion for this experiment yet. You can suggest one here.



By submitting a comment, you promise that you have your parent or guardian's permission, you are 13 or older, and you agree to Experimonkey's Terms of Use.


The daily "Did you know?"

In seahorses, it's the male that carries the babies and eventually gives birth.

Vote to find out who knew!