For some, winter means warm sweaters, skiing, and tropical travels. For others it means dry air, cracked skin, and uncomfortable sinuses. But instead of digging out the humidifier as the temperatures drop, you can instead build yourself this perfectly safe living room tornado machine that works using water mist.

YouTube’s NightHawkInLight posted a detailed explainer on how to turn an old garbage can, a ventilation fan, and a bunch of ultrasonic foggers into an impressive looking contraption that generates a constant visible vortex as long as you keep refilling its water reservoir. It’s perfectly safe for use indoors, so it’s not going to suck up your chihuahua or anything. Unless you decide to super-size it somehow.

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[YouTube]