Kevin McCarron excelled as an educator and enjoyed finding simple, quality ways to create lab equipment. This page will feature some of his work.
This telescope can spot Neptune. Its lens has a long focal length giving the images a quality size.
(As Seen in the library at Yerkes Observatory, this device was placed on the eyepiece end of a Galileoscope. The Sun's image would be projected on the screen when the telescope is aimed at the Sun.)
Stick a potato on it and plug it in!
The variable resistor allows for simulation of stars of different surface temperatures. Spy these changes with a diffraction grating.