Get your Scavenger Hunt on and participate in the QR Code Hunt. It all begins with the sign outside of the library. And remember, even if you don't have a smart phone, you can still participate by following the web link underneath the QR code. Happy hunting!
PIC borrowed from: http://www.launchsquad.com/blogs/whatsnew/2010/12/02/qr-codes-making-the-visceral-world-link-able/