CLEANING DIRTY PENNIES
Needed:
--dirty pennies (the dirtier, the better)
--about 1/2 cup vinegar
--2 teaspoons of salt
Amelia explained to me that they first gently stirred salt into vinegar - carefully, not to splash, "or they would all smell like pickles!"
Second, they dropped in the pennies and swirled the mixture for a minute. Finally, they fished out the pennies and rinsed them with clean water.
Voila! Cleaner pennies with two simple household ingredients.
Apparently, the science behind this is the effect of the acidic vinegar, when mixed with salt, on the cooper oxide from the dirty pennies. Amelia probably has little interest in the science details at age five, but she definitely thought it was fun!