Okay kiddo, have you ever made a mistake? Like coloring outside the lines or spilling something on the floor? Well, sometimes grown-ups also make mistakes on their computers. But don't worry, they have a magic button called "undo" that can help fix their mistakes!
When you click "undo," it's like a magic spell that makes your mistake disappear. It takes you back to before you made your mistake so you can try again. Think of it like a time machine for your computer.
The "undo" button is really handy when you're writing a story or sending an email. If you accidentally delete something important, you can just click "undo" and it appears again, like it never left. Even grown-ups use "undo" all the time, because sometimes even they accidentally make mistakes.
So, the next time you're on the computer and you make a mistake, just remember that you have a special button called "undo" that can help make your mistake disappear like magic!