Time to mix Presidents Day with science! We’re about to find the best cleaning solution for those dirty pennies you have laying around.

For this activity you will need the following items:

• • Pennies. The dirtier the better
  • Small dishes, cups or bowls
  • Various liquids to clean the pennies. Some suggestions:
    
    • • Lemon or lime juice
      • Water
      • Soy sauce
      • Dish soap
      • Vinegar
      • Ginger ale
      • Ketchup
      • Salt water
      • Hot Sauce
      • Mustard
      • Milk

Now here’s what you do: 

1. 1. First of all, you will want to make a guess (or hypothesis) about which liquid you think will clean a penny the best.
   2. Place each penny in a separate dish/bowl/cup and write down what the penny looks like. 
   3. Add various liquids to each bowl and record what you put in each bowl.
   4. Make observations and talk about what you see. Is anything changing?
   5. Leave the pennies for a few minutes- maybe have a quick dance party- and come back to see if there are any changes. 
   6. Make observations by talking or writing down what changes you see to each penny. Was your hypothesis correct?
   7. You can do this experiment again by trying new liquids. Adults, make sure you assist if a cleaning product is chosen.

We’d love to see how your experiment turned out! Post your pictures on Facebook or Insta using #CMofILHomeFun

 Source: teachbesideme.com