Exploratorium Senior Scientist Paul Doherty demonstrates a fun handson activity for exploring circuits and sound, using an old radio, a solar cell and LED, and a speaker. This video explains the science involved.

The Exploratorium Teacher Institute (TI), the professional development arm of the Exploratorium, has worked with middle school and high school science teachers since 1984. TI offers a rich mix of handson activities based on Exploratorium exhibits, contentbased discussions, classroom materials, Webbased teaching resources, and machine shop experiences through our Summer Institute, Saturday workshops, alumni workshops, teacher induction programs and more. Learn more at http://www.exploratorium.edu/teacher....