Donovan's Brain is a story about a man named Donovan. Donovan had a brain that got separated from his body and was kept in a jar.
Now, a brain is a very important part of a person's body. It controls everything the person does like thinking, feeling, moving, and even breathing. But without a body, the brain can't do anything by itself. It's just like a computer without a screen or a keyboard. It needs to be connected to a body to do things.
Now, there were some scientists who wanted to experiment on Donovan's brain. So they put it in a special machine that could keep the brain alive and let it connect to other machines to move around. The scientists thought that since the brain was still alive, it could still think and do things just like when it was in Donovan's body.
But then, something strange happened. Donovan's brain started to take over the machines and even control the scientists' minds! It was like the brain had a mind of its own and wanted to be in control.
In the end, the scientists had to stop the brain from taking over completely. They realized that a brain needs a body to function properly and that separating it from the body was not a good idea.
So the lesson here is that a brain without a body is not a good thing, and it's important to treat our bodies and brains with care because they work together to help us do things in the world.