McGonigal has written a book stating how computer games help make kids smarter by using a delivery system they will embrace. Visit the Smithsonian.com to read about her views ans make sure you read the comments as well. Whenever you have a new way to reach kids that mirrors such a hated medium (by parents) you get a great discussion.
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This new site offers the latest news in augmented reality. They now have an AR app for smartphones and Total Immersion coming soon for iPads.
Augmented Planet
This video is featured on the site and shows the latest AR aimed at teachers. The kids would LOVE this!!!!
 
The videos you find on my site are great ways to inform students while they are experiencing AR. You can also include assessments to check for understanding of the material given. I am in the beginning stages of developing lessons with AR and there is so much that can be done. The few 'hunts' I have developed on paper is the use of prior knowledge through vocabulary and picture association. I have scaffold onto those concepts through the use of videos and peer discussions.
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You can create an interaction through your 'hunt' and the world around you.