He wrote in the universal language ... music.
his father influenced him to write and compose music. :)
Wolfgang Amadeus Mozart
Wolfgang Amadeus Mozart never stopped composing. On the day of his death, he was starting to write another piece of music.
classical
Yes, he did. It's been said that Beethoven has written about 300 to 400 pieces in his lifetime, whereas Mozart (Wolfgang Amadeus, not his father Leopold) composed over 1000.
Around that age, the Mozart family did a lot of travelling around Europe. Wolfgang's father, Leopold Mozart, bought a small clavier to take with them so that they (Wolfgang and his sister, Maria Anna) could practice. When not on the move, Maria Anna, or Nannerl, would write small pieces of music and practice, but Wolfgang Amadeus Mozart would play with the local children, or go sightseeing.
impressive
Of course there is no right answer for this, but in my opinion I would give 2 composers: Ludwig van Beethoven and Wolfgang Mozart. Both are well-known and well-documented, and both have had major motion pictures made about their fascinating lives: Immortal Beloved for Beethoven, Amadeus for Mozart.
Mozart's most important achievement in his early years would be surviving birth. This is not a joke or a poor attempt an an answer. Of the seven children birthed by his mother, only Wolfgang Amadeus and one sister survived.At a very early age, 4 or 5, Mozart could read and write music, and was very gifted on the piano and violin. Mozart composed two rather short songs when he was five years old. He wrote and played his "Andante" and "Allegro in C" for his father.Mozart composed 13 symphonies between the ages of 8 and 15.Wolfgang Amadeus Mozart was definitely a child prodigy.
Of the HUNDREDS of awnswers that could be said, I personally think it is that one, he started composing before some children can write their own name! Also, in his lifetime, he composed thousands of songs! I play in orchestras so he is one of my favorites!
His most famous are Le Nozze di Figaro, The Magic Flute, Così fan tutte & Don Giovanni. Go to this page, http://en.wikipedia.org/wiki/Magic_flute, and you can read an entire list of his productions.
Mozart lived 1765-1791, and was composing literally all that time. He probably started when he was 2 or 3 and composed until his death (33 years approximately all together).