When Wolferl was four years old he began to take lessons. While he practised no one ever spoke to him because he was so serious about it. If other children came to play with Nannerl he would make music for their games and marching; playing in strict time all the while. Here is Nannerl's picture when she grew up to be a young lady. [Illustration: MOZART'S SISTER.] Father Mozart loved both of his children deeply and often played with them. The violin was the instrument he liked best and little Mozart had daily lessons in his home. Here we see him playing while his sister sings. [Illustration: A MOZART FAMILY TRIO.] In this picture we see Papa Mozart, who was a very fine player on the violin. Wolferl and Nannerl are playing the piano. [Illustration: MOZART PLAYING WITH HIS FATHER AND SISTER.] When Wolferl was nearly six his father took him and Nannerl on a concert tour. Everybody wanted to hear them play and they gave many concerts. Wolferl spent all his boyhood with his music. He went to many places to play, even as far from Salzburg, in Austria (where he was born), as to Paris and London. Everywhere he went people were happy to see him and his sister and to hear them play. And they, too, were happy to play because they loved the music so much. When they reached Vienna they played for the Emperor and Empress. When Wolferl was presented to the Empress he jumped up into her lap and kissed her. Wolferl was always busy composing music. But he played games and had a good time just like any other boy. When he was busy with his music, however, he never let his thoughts go to anything else. But we must not go too fast, for we want to see how Wolferl is growing up. Here is his picture when he was five years old and beside it another when he was eight years old. Do you see his wig and sword? [Illustration: MOZART AT FIVE.] [Illustration: MOZART AT EIGHT.] Everybody in Paris wanted to hear Wolferl play when they knew that he had come, so they asked him to read at sight; to play the bass part to a melody and to accompany a song without seeing the music. People also took great delight in asking him to play on the harpsichord with a cloth stretched over the keyboard so that he could not see the keys. They all went to London to play for the King. The King wanted to see for himself how skilful little Mozart was, so he gave him pieces by Bach and Handel to play at sight. Mozart read them off at once. Here is a fine picture of the Mozart children when they played for the King and the Queen. [Illustration: MOZART AT THE COURT OF THE EMPEROR.] It must have been very fine for a little boy of seven to play for kings and queens. But Wolferl was not spoiled by it all. He was just a happy hearted boy all the time. He always made it a rule to put his mind on what he was doing and do it the very best he knew how.