Piccolos' cousins are fifes and flutes. Fifes are a type of fipple flute, which is a woodwind instrument that has a plug inside the tube to create a whistling sound when air is blown through it. They are typically made of wood or metal and have six finger holes. Flutes are also a type of woodwind instrument, but they have an open-ended tube with no plug. They are usually made of metal and have eight finger holes. Both instruments are commonly used in marching bands and orchestras.