Sweet Pea is 4 years old.
From: This idea was from Quirky Momma.
1/4 cup Vinegar. 1 tsp Salt. A small (non-metal) bowl for the vinegar and salt. A bowl of water. Several grubby pennies. Rags for scrubbing the pennies. Towels for containing the mess.
Mix the salt and vinegar in the [...]