I made this in OpenSCAD after seeing a similar one that one of my kids had. It's rendered at 0.66mm thick, and I print it at 0.33mm layer height.
It's a pretty quick print and would probably make a great demo piece, too.
The photos of the red bookmark show the older version, which had no nose. The blue one is the latest version.
UPDATE 9/1/12: I fixed the centering on the slots, brought the eyes and hands in a little bit closer, and added a nose.
1) Print (0.33 layer height works well)
2) Insert 10mm googly eyes. Mine didn't even require glue -- they're held in quite nicely by the ridges on the layers.
3) Go read a book.