While the Piano does have keys like an Organ it does not use air blown through pipes to make the sound, it uses strings.
Before recorded history, early humans discovered that by stretching a string between sticks you could make all kinds of useful thing like a Catapult, a Bow, a Drying rack, a Bed, a Firestarter and a Music Maker.
Early humans made string from many kinds of natural materials including Plant Fiber, Horse Hair, Intestines, Silk, Linen, and Rawhide.
When you fire an Arrow theBow string makes a cool sound. At some point, early humans saw the potential for a stringed instrument by adding a resonance box to amplify the sound of the taught Bowstring.
Early Stringed instruments were probably very similar to the African Bow Harp or the Greek Lyre.
The first metal strings that we know about were made in Germany in 1351 well before the Harpsichord, they were probably used on a popular Harp like instrument called a Zither.
