This kind of electrical coil which shoots up huge volt of blue electrical charges is named after scientific inventor, electrical engineer Nikola Tesla who has huge contributions in the field of electromagnetism. This kind of coil is seen in the sci-fi movies like The Prestiege and heard of in novels like Frankenstein. Now, one can build Tesla Coil easily by means of metal plates, bolts, brackets etc. This things you can find easily in a hardware store. You have to find a transformer also which has a capacity of 9,000 or more volts and 30 milliamps. But always remain very careful because it can give shock which is fatal.