My friend, Calvin Witt of Make It With Calvin, picked up a little Tesla coil/plasma speaker kit for me from All Electronics the other day.
This weekend, I put it together, and added some of my own customizing touches to make it look and sound a bit better.
This is a delightful and easy little kit for less than $10, and it's a real treat to hear a high-voltage spark playing music.
You can get your own kit right here: https://www.allelectronics.com/item/tcl-35a/tesla-coil-speaker-kit/1.html
Make It With Calvin: https://www.youtube.com/channel/UCXeiTG-w10llDMIWz4Yhp6g