Before you have children, you hear a lot of horror stories, mostly from people who raised a kid forty years ago. There's the standard stuff about never sleeping again, eating discarded, unappreciated...
Much like with video games, my philosophy of learning to play a musical instrument is the rewards make you want to move on. I've developed this view of playing an instrument, in no small part, by watching my son. Just as with a video game, he had to move on in levels. He is now an amazing guitarist and musician.
A group of Canadian scientists who specialize in learning, memory and language in children think music good for the brain and soul. They have found evidence that pre-schoolers can improve their verbal intelligence after only 20 days of classroom instruction using interactive, music-based cognitive training cartoons.