Designer Mike Clare made roll cookies that have a marker that can be detected by augmented reality software. When he waves one of the cookies in front of the webcam, his computer displays a colorful symbol on it.
Huh, William Gibson was right! He wrote about 'augmented reality' or really his version was like geo-coordinates with pieces of art all around and you could be hooked into different channels to see different realities.
Spook County (country??) sorry I'm sleepy :)