Article: Augmented reality sandbox lets you change the course of rivers, won't get you wet

I saw this on Twitter last week or so and I thought it was so cool I had to share...

Augmented reality sandbox lets you change the course of rivers, won't get you wet
http://www.engadget.com/2012/05/07/augmented-reality-sandbox-lets-you-change-the-course-of-rivers/