Exploratorium
Exploratorium: Science Snacks: Charge and Carry
This site from The Exploratorium Museum is a full description of a short activity. An electrophorus plate and a Leyden jar are made. The electrophorus is charged by induction. Its charge is transferred to the Leyden jar by conduction...
Optical Society
Optical Society of America: Optics for Kids: Polarized Light (Pdf)
An investigation into how polarized light behaves, with instructions on how to make a polarizer using glass slides. With a link to an article explaining about polarized light. PDF (requires Adobe Reader).