Wanted: Rubber Ducks

File this under your 'What in the world?!' musings of the day:A curious installation piece has popped up on campus, just north of Frist. It looks like the kind of donation boxes set at the front of restaurants or stores, but instead of asking for 'dolla dolla bills, ya'll,' the box was lined with...rubber duckies. How the iconic bath toys made their way into the container is no mystery; propped atop a glass case are the instructions:1. Drop duck2. Take card.What is a mystery, though, involves larger, thornier questions: Where did the installation come from? Who put the box there? What is it for? And what can we expect, come April 11 (see below)?Musings, answers, potential hypotheses welcomed  in the comments section. Take a stab, and perhaps you can relieve this reporter from the agony of not-knowing.