If you live around, or ever find yourself visiting, Johnson City, Tennessee it is definitely worth visiting the Hands On! Regional Museum. The museum features a very electrifying exhibit, The Tesla Experience!
The Tesla Experience is a unique exhibit which features a 250,000 volt Tesla Coil that also plays music. What makes this Tesla Coil unique is that it is bi-polar. This means that the coil has two spheres to exchange the electrical discharge instead of the traditional one sphere.
For more information on the Telsa Experience you can read this articel from the Bristol Herald Courier: http://www.heraldcourier.com/news/article_e963dd40-02cf-11e4-811c-001a4bcf6878.html
The Hands On! Regional Museum is located in Johnson City, Tennessee and more information can be found on their website: http://handsonmuseum.org/