DIY USB microscope for $15
For all the aspiring Doktors out there, comes a cheap hack from Make:

- - photo via makezine.com
You can make your own USB microscope using an old webcam and a cheap toy microscope. All it takes is a soldering iron, some hot glue, and an hour of your time. Instructables user moris_zen has the details, which basically involves a little focusing trial and error before gluing things together:
