Okay kiddo, do you know what a recorder or a whistle is? They make sound when you blow into them, right?
Well, the part of those instruments where you blow into is called the fipple. It's a small, often triangular shaped piece that is usually made out of plastic or wood.
The fipple is important because it has a special shape that helps to control the way air moves when you blow into the instrument. This helps to create the correct sound and make it easier to play. Without the fipple, it would be much harder to make any sound at all!
So next time you play a recorder or whistle, remember that it's all thanks to the little fipple inside.