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See the full experiment here: http://www.stevespanglerscience.com/lab/experiments/homemade-hand-warmer
If you’ve ever spent time outdoors in the cold, there’s a good chance you’ve used or seen chemical hand warmers. If you want to experience the science inside of those disposable plastic bags, then try your chilly hand at the Homemade Hand Warmer experiment. You can witness how an everyday chemical reaction like rusting can be used to keep your digits from falling off.
Want more experiments like this? Check out http://www.stevespanglerscience.com/product/naked-eggs-and-flying-potatoes
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