Is it true that listening to classical music is good for your baby?

My Eggo is Preggo asked the question: I am 23 weeks pregnant & have been told that I should play classical music for the baby to hear. Why is this? & do you have any suggestions for songs/composers?

What’s the best harmonica to play classical music with?

Fillip asked the question: If you go on Youtube there are some different tunes played with the harmonica in classical music. I was wondering if this can be done with any harmonica or do certain types lend themselves better to certain types of music?
Thanks.