My aunt told me to apply cold packs while one of my close relatives vouched for heat packs. What should I do? I don't know when to use cold packs and when to use heat packs. Please help.

Select two student volunteers—one to activate one cold pack and another to activate one hot pack. Have each student feel each bag and guess what is inside each. They should notice a dry pellet-like ...

We're talking about hand warmers! Here is everything you need to know about the tiny hot packs. “There is an intricate chemical process that takes place inside these bags,” says Orbax ...