QbA is an artist duo known for leaving hand painted messages on pre-decimal pennies stuck to walls (#pennydrops). Sometimes these pennies have accompanying clues to their location left on social media; on other occasions the pennies are left in obscure locations and lie undiscovered for years. Some are left in the change trays of vending machines. The duo think of their pennies as individual, quiet voices in a loud environment.
The main website is here.