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I don’t know why we continue to call them “everyday household items.” Behind their coy, artificial commonality, many of these objects are concealing the ability to produce wonders. The modest collection of items described by this article is no different… using little more than a glass bowl, a few plastic lids, a cork, and and a toothpick, this construction can generate a stable plasmoid (aka Ball Lightning) in an ordinary microwave oven.

The linked article’s early-nineties web design leaves something to be desired, but who has time for modern web design when you’re knee-deep in science?

How to build a stable plasmoid at one atmosphere
More fun with plasma, including improved plasmoid generators