Some stuff is just too cool not to re-blog. This is one of those things.
Found originally at Oh Gizmo!
the maker claims the Tiny Musical Tesla Coil can play music via your laptop and a USB cable. At only 6″ tall, the coil plays MIDI tunes direct from your computer by controlling pressure waves generated by 4″ sparks from the coil. Of course, some assembly is required, including basic soldering, hand tools and paint-on or spray-on varnish. The kit contains a single-resonant solid-state SSTC Tesla Coil that is safe and reliable and costs about $229. Pretty freaking awesome, in my opinion.
Product page at Think Geek