You ever go somewhere where it’s really, really, really cold outside, so cold that you can toss a cup of water out and it will freeze into snowy powder before it hits the ground?
Cotton candy is like that, except instead of water, you’re using sugar, which has to be really hot to melt into liquid and turns back into a solid at room temperature. The reservoir in the middle gets really hot and spins really fast. The sugar melts and the centripetal force of the spinning reservoir forces the liquid sugar out of the reservoir through tiny holes in the sides where it rapidly cools and becomes a solid again. But because it’s traveling so fast when it cools, you end up with a sort of wispy string of sugar. Roll up a bunch of those wispy strings around a paper cone and you’ve got cotton candy.
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