This basic solar-energy instruction kit has a 2-1/8" x 1-1/8" 1/2V solar cell.a small DC motor and a 4" dia diffraction-foil disc that will mount on the motor shaft. Includes an excellent instruction sheet.
Oakley STEM Center Lending Library
https://www.tntech.edu/stem
155 W 7th Sthttps://www.tntech.edu/stem
Cookeville, 38505
USA
(931) 372-6573