Some friends of mine from MITERS have started something pretty cool, an open-source company for providing mini musical Tesla coils for the masses. I'm probably going to purchase a kit and make one. Highschool physics classes, or even college Electricity and Magnetism classes would love to have these. Or even musicians because of its bright, pure tone. Congrats, oneTesla, for being the first Kickstarter project that I've ever donated to :D
Here's an old demo of it at MakerFaire NYC. It's matured significantly since then.