Okay, imagine the flute is like a magic tube that makes music! When you blow air into it, the air travels through the tube and comes out with a sound. But here's the really cool part: the flute has holes!
When you cover a hole with your finger, it changes where the air can go. If you cover a hole, the air has to travel a different path, and this makes a different sound. Think of it like a slide at a playground. If you go down the slide from different spots, you will feel going down differently, right? The flute works the same way!
So, if you cover one hole, you might get a low sound. If you cover more holes, that sound can go higher or lower. Each hole helps make a new and special music note!
So remember, the flute plays a different sound when you cover a different hole because it changes how the air moves inside it!