Incredible But True Incredible But True Human World History Makers Cities Of The World Art And Music Sporting Headlines Plant Life Fish, Amphibians, Reptiles Birds and Mammals Creepy Crawlies Marine Life Restless Earth Earth's Secrets Changing Weather Seas And Oceans Comparisons Amazing Structures Machines And Man World Of Inventions Travelling Around Mysterious Universe	Genius Mozart was a musical genius. He wrote his 1st symphony when he was 8 years old and was employed as a concertmaster by the age of 13.   Previous: Back Book: Incredible But True Section: Incredible But True Chapter: Art And Music