ELI5: Explain Like I'm 5

Nightingale floor

Have you ever heard about the Nightingale Floor? It's a very special floor that has tiny pieces of wood and metal underneath it, which makes it sound like a beautiful song when someone walks on it.

Imagine if you were walking in your house, and every time you take a step, it makes a different sound. How cool would that be, right?

Now, the Nightingale Floor was invented a long time ago in Japan to help protect important places like castles and temples from bad guys. When someone tried to sneak in, the floor would sing like a bird, alerting the guards that someone was there.

So, in summary, the Nightingale Floor is a cool floor in Japan that has tiny pieces of wood and metal underneath it, making a beautiful song when someone walks on it. It was invented a long time ago to help keep important places safe from bad people.