Laser microscope
Just a clip from the development phase of my laser projection microscope (an idea I got off instructibles.com; I didn't invent this). The 532nm laser shines on a single, suspended droplet of water from one of my aquariums. The droplet serves as both sample slide and lens, whose curvature conveniently happens to be perfect for enlarging the shadows, cast by the organisms in the water, to an easily viewable size on a wall about 10-15 feet away.
