We love this app Aurasma!
Its quick and simple letting you create augmented reality tags for your iPads. We have used it to help students find there way around schools or while they are out and about. Take a picture of something, in our case a sign outside an office, then attach a video or something else to that picture. When a student uses the app and looks at the sign through the camera the video pops up explaining what the room is.
Interest then take a look at it on the app Store. We have a link to iOS and android version of the app.
Visit http://www.aurasma.com/ to find out more about this app and to see some examples of the work they have done.