Why do we forget things we just learned or heard?

We forget things we just learned or heard because our brain needs time to get used to them, like a new toy that takes a little while to understand.

Imagine your brain is like a big shelf, and every time you learn something new, it's like putting a new toy on the shelf. At first, the toy is bright and shiny, and you know exactly where it is. But if you don’t play with it again soon, it starts to fade into the background.

Your brain works like a detective, it pays attention to things that matter right now, but sometimes it lets go of things it thinks aren't important yet. That’s why, even though you just heard something or learned it today, your brain might not remember it tomorrow unless you use it again.

It’s like when you learn the name of a new friend, if you don’t see them for a few days, you might forget their name at first. But once you use it again, it becomes easier to remember!

So, just like you need time to get used to a new toy or friend, your brain needs a little time and practice to remember the things you've learned.