Magnetic Music

Magnets, how do they work? Here they are not so much working as playing. YouTuber Magnetic Games built a seven-note scale using magnets and the resonance they provide when they repel each other. After tuning the screws, he plays a couple of songs you will recognize. I'm not all that sure what he's doing in the second half of the video, but it looks like a lot of fun. (via Nag on the Lake)