This one-minute film manages to be visually engrossing with an extremely limited medium. Cymatics consists simply of lycopodium powder dancing on a surface vibrating at 50 Hz.
This video looks absolutely computer-generated, as though it were made by some super-advanced particle engine. But this is actual, real-world video footage, showing a fine power called Lycopodium reacting to vibrations from speakers placed directly below it. Amazing!