The Game Boy Camera is a monochrome, 2bit, 128×112 pixel CMOS camera from 1998 that was especially made to work with the Nintendo Game Boy. It is well known as the first affordable portable digital camera and was actually considered decent in its day. Currently it is not much more than a curiosity from days long past, but nevertheless fun to play with. I am not the only one who thinks this way as countless mods and hacks can be found on the internet, where people use this little camera in ways that Nintendo probably never envisioned.
Full article, and more photos: http://home.strw.leidenuniv.nl/~pietrow/astrogb.html
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Photo from leidenuniv.nl