Okay kiddo, so Revolution 9 is a song that was created by a very famous band called The Beatles. It's a little bit different from their other songs because it's not really a song that you sing along to like "Twinkle, Twinkle, Little Star".
Instead, Revolution 9 is what we call an "experimental" piece of music. This means that the band wanted to try something new and different. They used a lot of weird noises, like people talking backwards and strange sound effects that don't really sound like music at all.
It's kind of like when you're playing with your toys and you're making up different sounds and stories. The Beatles were doing the same thing but with music!
Some people really love Revolution 9 because it's so interesting and different from anything else they've heard before. Other people don't really like it because it doesn't sound like normal music.
So, although it's not a typical song, Revolution 9 is a really important part of music history because it showed that bands like The Beatles were always trying new and innovative things in their music.