A fife is a small, skinny instrument that people blow into to make music. It looks like a long, thin tube with holes down the middle. When you blow into it and cover the holes with your fingers, it makes different pitches and notes that can be used to play songs. It's kind of like a kazoo, but you have to use your fingers to make the different notes instead of just humming. People often play fifes in marching bands or military ceremonies, because they are loud and easy to carry around.