Okay kiddo, have you ever heard a noise that was just kind of random and didn't seem to make any sense? That's called random noise!
Think about when you're playing with your toys and you accidentally knock over a bunch of blocks. They all fall down and make a loud crashing noise. That's noise, but it's not random because we know where it came from - the blocks falling over.
Now imagine being in a really quiet room and just hearing little sounds here and there, like the ticking of a clock or a car driving outside. Those sounds are also not random because we know what is causing them.
But sometimes we hear noise that doesn't seem to have any pattern or cause. This is random noise and it can come from lots of things, like static on the TV or the sound of the wind blowing. It's just a bunch of random sounds mixed together.
Scientists study random noise to see if they can find patterns or hidden messages in all the randomness. It's like trying to find a needle in a haystack!