A nonprofit publication of the Kentucky Center for Public Service Journalism

Science Guy: The weather outside is frightful, but making instant hard warmers is delightful

Keeping your hands warm when it gets cold outside can be a challenge. Not anymore.
“Science Guy” Jason Lindsey and a kid scientist show us how to use a few ingredients from around the house to create an instant hand warmer.

Instant Hand Warmer

· Calcium Chloride
· Water
· 1 Hefty Slider Quart Storage Bag
STEP 1: Place one tablespoon of calcium chloride into the Hefty Slider Quart Storage Bag.
STEP 2: Add two tablespoons of water to the Hefty Slider Quart Storage Bag.
STEP 3: Push the air out of the bag, close the bag, mix the ingredients, and touch the bag.
When the ingredients are mixed together a chemical reaction happens, which produces heat. Click here for more experiments that might get you and your family “Hooked on Science.”
View a video of the experiment below:


Jason Lindsey is an award-winning science educator and author. Jason studied science and journalism at Western Kentucky University, focusing on general science with an emphasis in meteorology and climatology. Each year he performs hands-on science experiments at hundreds of schools and community events throughout the United States, as well as produces and hosts a hands-on science segment airing on television stations across the nation. He previously worked as a chief meteorologist, backpack journalist, science reporter and webmaster.

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