GOAL: cheap, portable, low-power magnification of living invertebrates, especially useful with foam-well slides. See:
http://www.eeob.iastate.edu/faculty/DrewesC/htdocs/foamslide1.jpg

Illuminate object via sub-stage or above-stage illumination using penlights or ultra-bright LEDs.  See:

http://www.eeob.iastate.edu/faculty/DrewesC/htdocs/portascope1.JPG

See other write-ups and activities related to LEds and photobiology at: http://www.eeob.iastate.edu/faculty/DrewesC/htdocs