It was unfair to call the piano a "keyboard" instrument, as strings resonate in it to produce sounds, just like on a violin. Not all key instruments are keyboard instruments. This evening, we will get acquainted with all the keyboard instruments that have keys and also with those that are no keyboard instruments, yet without keys, they would not be worth anything! There will be contestants; the devil of the keys will also enter the stage; in fact, the audience and the musicians might eventually make some music and sing together.