Cleaning pennies can be a fun family activity (provided the pennies are dirty but not valuable). Here are five easy ways to make the copper shine!
Cleaning Pennies — Mr. Bond's Science Guys
Clean pennies with Vinegar and Salt
Coin Collecting for Beginners
How to Clean Pennies Quickly & Safely: 6 Ways
Coin Collecting for Beginners
How to Clean Pennies for Crafts ⋆ Dream a Little Bigger
How to Cash In More than a Cent from Your Pennies
Coin Collecting for Beginners
Clean or Green Penny Activity
How to Clean Pennies for Crafts ⋆ Dream a Little Bigger
STEAM Fun: How To Clean a Penny