Saturday Morning Science Experiment: Ice cold outside, "hot ice" inside

Sodium acetate is such a useful little chemical. Not only is it responsible for the awesome flavor of salt and vinegar potato chips, but it also produces the heat in those little reusable hand and foot warmers you can buy at outdoor stores. Plus—when it's just too damn cold outside and you'd rather spend the day indoors—the same reaction that keeps your fingers and toes toasty can also be used for fun at-home art projects.

You can buy sodium acetate online, but all the real Cool Kids are making it themselves.

Thumbnail image courtesy Flickr user puroticorico, via CC