Bell test

Okay, imagine you and your friend have two magic boxes. These boxes can do mysterious things that you can't explain.

Now imagine you and your friend want to know if your boxes are connected in a special way. To find out, you both decide to play a game called the "bell test."

The "bell test" game works like this: You and your friend will each push a button on your magic boxes. When you push your button, your box will do something mysterious and send a message to your friend's box (even though you're not in the same room with your friend!).

Your friend's box will also do something mysterious when they push their button, and it will send a message back to your box.

You and your friend will keep pushing the buttons and sending messages back and forth until you know for sure if the boxes are connected in a special way.

But there's a catch: You and your friend have to play this game many times and keep track of all the messages you send and receive. Only by analyzing all of the data can you prove that your boxes are connected in a special way.

And this is basically what a "bell test" is in real life! Scientists use special machines (instead of magic boxes) to play this game and prove that tiny particles (like electrons) are connected in a special way that can't be explained by normal logic. It's really complicated and takes a lot of math and science to understand, but the "bell test" is a very important experiment that helps us to understand how the universe works.