Animal Index Cards by Hiroshi Sasagawa. Not yet available in the U.S., but Japanese residents can buy them here. First seen at lost.net.au/vic.
I remember reading a chapter of Urusei Yatsura (scan below the fold) where literary creatures burst out of books and flood a library. These two products, both by Japanese designers & featured on countless blogs, give the same sense of text transformed into flesh.
Also, since there’s no telling when or if the index cards will be available stateside, you can make your own. Use this stencil necklace tutorial as a starting point.
The Story Behind the Bookmark, by Yuko Tokuda & Yumiko Komiya, $16.00 each at Greener Grass Design. First seen at PingMag.