1.To develop good taste in music, learn to understand and appreciate master works by composers such as Bach, Mozart, Beethoven, Brahms,Chopin, to name a few. This is probably one of the best gifts any parent can give your child.
2. To be able to play the piano, a child not only need great coordination, but more improtantly will learn how to solve his/her problems effectively. This will apply for other academic areas as well.
4. Of course these can be acheived by learning almost all instruments, but piano is probably one of the easiest instrument to start on.