Beaty, W.J., (1996) What is Electricity? — An interesting discussion on the meaning of "electricity"; various definitions and uses of
Edison Talking Doll Recordings, 1888-1890
Hear Edison Talking Doll Sound Recordings — Links to recordings
History of the Wanamaker Organ at Macy's Philadelphia
Inside the Deepest Part of the World
NASA - Tour of the Electromagnetic Spectrum — ab. 30 min
Quantum Theory Made Easy — 30 min
Refraction explained with a toy car
Resonance Experiment! (Full Version - With Tones) — WARNING: Please lower your volume. The audio in this clip could cause hearing damage.
The car example starts at 7:08
The Wanamaker Organ - Inside the world's largest operating musical instrument
Waves - Introduction — basics