A monkey wrench is a special tool that is used to tighten or loosen bolts and nuts. It looks like a long, metal handle with a big adjustable jaw at the end. The handle of the monkey wrench is usually shaped like an "L" or a "C" so that it is easy to hold and use.
Now, let's imagine you have a toy car that you want to put together. The toy car has tiny screws that you need to tighten to hold the different parts in place. But you can't do this with your hands, because the screws are very small and it's hard to grip them. That's where the monkey wrench comes in!
You can use the monkey wrench to hold the screw tightly while you turn it with your other hand. The adjustable jaw of the wrench allows you to change its size, so you can fit it around different size screws. For example, if the screw is big, you can make the jaw of the wrench bigger. If the screw is small, you can make the jaw smaller.
Once you have the monkey wrench in position, you turn it either clockwise or counterclockwise, depending on whether you want to tighten or loosen the screw. When you turn the wrench, it uses its strong grip to hold the screw in place so that you can work on it easily. This allows you to tighten or loosen the screws on your toy car or many other things, like a bicycle, a chair, or even a table.
So, in simple terms, a monkey wrench is a handy tool that helps you tighten or loosen screws and nuts by holding them firmly and allowing you to turn them easily. Just like how a grown-up uses a special tool, like a monkey wrench, to fix things around the house, you can use your own toy tools to pretend to be a handy helper too!