sun/light sensitive paper

[plaidslothbutt.livejournal.com]

i was just wondering if anyone has seen sun or light sensitive paper in craft stores recently. the kind of stuff that you put leaves or other such things on and then lay out in the sun, and everything that isn't covered turns blue. i know we had a package of it in my house, but it's not worth the hunt. so if you have any info, help a girl out.