A bellows is a device that consists of a flexible, air-filled chamber that can be expanded and contracted to move air. It is commonly used to create a strong blast of air for various purposes, such as stoking a fire or providing air to musical instruments like the organ or bagpipes. Bellows are typically made from materials like leather or fabric, reinforced with wood or metal frames. When the bellows are squeezed, air is forced out, and when released, they draw in air. This simple mechanism has been utilized for centuries in different applications, from blacksmithing to woodworking.