Residents of Mousehole, Cornwall woke on the morning of 1 April 2010 to find their town had been overrun by mice. Knitted mice. The small, woolen rodents lined the harbor and perched atop handrails. Each mouse had a note attached, "If you like me, please feel free to keep me." A group calling itself the Graffiti Grannys soon emerged to take credit for the prank. They were a group of women, ranging in age from their mid-40s to 96, who loved to knit and loved to share their work. They explained that their motive for unleashing yarny creatures upon Mousehole was simply to make people smile.