This is a cool laser microscope you can make at home and study things around you easily and inexpensively.  Here is a bit more on the video:

Simple microscope using a laser pointer and a magnifying glass. This differs from the water drop method and produces results more like a traditional microscope with enlarging via focal length changes. This is not spherical like water drops so the image can be projected many feet away from the wall without excessive spherical aberration. Depending on light emitting power of the laser vs. ambient room lighting, images could be enlarged to 30 meters or more.

Check out how they make this thing in the video on page 2

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