University of Colorado
University of Colorado: Ph Et Interactive Simulations: Faraday's Electromagnetic Lab
This interactive lab in electromagnetics effectively illustrates how Faraday's law works.
Smithsonian Institution
Lemelson Center: Spark!lab: Build a Speaker
Learn how to build your very own speaker with items usually found around the house. Follow step-by-step instructions and discover how to use your speaker to listen to the radio.