I was studying RC circuits recently and I'm interested in this: http://en.wikipedia.org/wiki/Pearson–Anson_effect It would be awesome if I can recreate a circuit like that. I know how to make a capacitor myself, but I don't want to buy a neon lamp. I'm wondering if there are any substances with low breakdown voltages? The lowest breakdown voltage I've seen in my textbook is several megavolts, and I can't reproduce that at home (it would be dangerous too). I've heard that salt water is a good conductor and distilled water is ideally an insulator. Maybe I can vary the salt concentration to create something with a low breakdown voltage? Thanks in advance!