The St Lorenz Interact Club hosted a Purple Pinky Project to help eradicate polio by raising $1 for every pinky that gets painted.
This is a symbol stemming from Rotarians immunizing children. When a child is immunized, Rotarians mark their pinkies with a topical purple dye to prevent double dosages, and to identify those who have not yet been immunized. Through Rotary International's efforts, polio has been eradicated in all but 2 countries worldwide.