Nannerl's Music Book is a collection of short keyboard (typically harpsichord) pieces, it is notable for containing Wolfgang Amadeus Mozart's first works. "Nannerl" was the nickname of his sister, Maria Anna Mozart who was also a talented pianist. It contains the following: Roland EXR-3 Keyboard Three-year-old girl playing with a keyboard The musical keyboard, also known as the piano keyboard is the set of adjacent depressible levers on a musical instrument which produce notes. ... A harpsichord is the general term for a family of European keyboard instruments, including the large instrument nowadays called a harpsichord, but also the smaller virginals, the muselar virginals and the spinet. ... W. A. Mozart, 1790 portrait by Johann Georg Edlinger Wolfgang Amadeus Mozart (January 27, 1756 â December 5, 1791) is considered among the most popular, significant and influential composers of European classical music. ...