When I first saw these things, I honestly didn’t know what to say, but you get used to ridiculous headgear pretty quickly around here. These MIDI hats were designed by Sunny Oh and Anna Obikane, and allow you to make music. Ridiculous or genius, I have trouble deciding which it is.
The hats themselves are made from wool felt embedded with steel wool to create pressure sensors. These in turn allow the manipulation of sound. The hats use a Lilypad Arduino that was programmed with MAX/MSP software to use them as MIDI controllers. The funny, colorful balls control volume and speed. The LEDs were added mainly for theatrical reasons. Once they are illuminated, it means that the hat is ready to play.
Watching this made me smile, even though the whole idea seems completely silly.