The composer Wolfgang Amadeus Mozart’s remarkable musical talent was apparent even before most children can sing a simple nursery rhyme.Wolfgang’s older sister Maria Anna (who the family called Nannerl) was learning the clavier, an early keyboard instrument, when her three-year-old brother took an interest in playing. As Nannerl later recalled, Wolfgang “often spent much time at the clavier picking out thirds, which he was always striking, and his pleasure showed that it sounded good.” Their father Leopold, an assistant concertmaster at the Salzburg Court, recognized his children’s unique gifts and soon devoted himself to their musical education. Born in Salzburg, Austria, on January 27, 1756, Wolfgang had composed his first original work by age five. Leopold planned to take Nannerl and Wolfgang on tour to play before the European courts. Their first venture was to nearby Munich where the children played for Maximillian III Joseph, elector of Bavaria. Leopold soon set his sights on the capital of the Hapsburg Empire, Vienna. On their way to Vienna,the family stopped in Linz,where Wolfgang gave his first public concert. By this time, Wolfgang was not only a virtuoso harpsichord player, but he had also mastered the violin. The audience at Linz was stunned by the six-year-old, and word of his genius soon traveled to Vienna. In a much anticipated concert, the Mozart children appeared at the Schonbrunn Palace on October 13, 1762. They utterly charmed the emperor and empress. Following this success, Leopold was inundated with invitations for the children to play, for a fee. Leopold seized the opportunity and booked as many concerts as possible at courts throughout Europe. A concert could last three hours,and the children played at least two per a day. Today, Leopold might be considered the worst kind of stage parent,but at the time,it was not uncommon for prodigies to make extensive concert tours.Even so,it was an exhausting schedule for a child who was just past the age of needing an afternoon nap. According to the passage,Wolfgang became interested in music because