Heat bath

Okay kiddo, imagine you're swimming in a big pool on a hot summer day. The sun is shining down on you and you're getting warmer and warmer. But then you notice that there are some cool patches of water around you. These patches of water are called the "heat bath."

A heat bath is kind of like a big pool of cool water that things can dip into when they get too hot. But instead of water, it's usually a substance like liquid nitrogen or chilled water that can absorb heat really well. So when things like machines or chemicals get too hot, they can be placed into the heat bath to cool down.

The heat bath also works in reverse. If something is too cold, it can be placed into a hot bath to warm up. Just like how you might sit in a warm bath to feel better if you're feeling chilly.

So, a heat bath is like a big, cool pool that things can jump into when they get too hot. It helps keep things from overheating and getting damaged.