This really couldn't get any easier. I found myself at my hackerspace with an incredible amount of lazyness in my hands. Well, lazyness to clean up the place.
Suddently I noticed an old plastic microscope (with and impressive 1000x zoom) and an old stripped usb webcam.
It was pretty obvious what to do... After adjusting the camera lenses to (very) close focus, an usb microscope was working in no time. You can even remove the IR filter from the webcam and get some IR lights under the microscope to get some awesome images, with the right colorants.
My blood. No kidding. No IR lights here tough.