This has been talked about for decades, and it's always the same story: expose your child to music, or have them learn to play an instrument, because it'll make them smarter![0] Why can't we for once say that if you expose your child to music, and give them an opportunity to learn an instrument, they'll be more able to enjoy and understand music, and have a skill that can give them joy through their entire life? Not everything has to be about intelligence and success; some things can just be about pleasure and joy.

[0] I know I'm somewhat mischaracterizing this article, but that's what the mainstream press makes of it.