Try QR Wild for information hunts around your school or college.
Go to http://qrwild.com/ and download a free QR code reader from the iOS or Google app store.
Sign up to QR Wild for free and create your first ‘game piece’ on their website, once you have verified your email address.
You can create your own game and download your own QR codes to scan. Print off a QR code and then activate it to add a message for finders to read, usually a clue for the next QR code to find. The codes can be linked to Facebook/Foursquare to allow scanners to check in. Badges can be awarded for completion of games.