Here is a musical Tesla coil kit that you can build with simple tools to put on a show. It can shoot sparks up to 4″. You can control your Tesla coil from a laptop using a USB interrupter. Want to make music using the sparks? No problem. You will learn a few things about electronics by assembling this kit.
The kit comes with pre-wound coil, USB interrupter, spun aluminum toroid, and everything you need to get started. More information is available here.