Fireplace bellows are very beautiful tools. They have been around since 930 B.C. Their design has stayed fairly well the same over the years with a few improvements made, particularly in the 1600s.
A fireplace bellow works as a single air pump tool. They are triangular shaped and consist of an air chamber and a valve. Grasping the handles and pulling them apart fills the chamber with air, while press the handles back towards each other directs the air out of the valve or nozzle.
This air flow can be used to get a fire going, as fires need a little air (oxygen) to get started well. Using a fireplace bellow is much safer than manually blowing on the fire as you have to get too close to the flames to make much of an effect on them.