In recent weeks, I have had the privilege of watching as my daughter's obsession with music has soared to new heights. She sings along to the radio. She writes her own songs ("Sunglasses. I want sunglassES on right NOW. Doggie wears sunglassES TOO. Mommy, sunglassES! Wear sunglassES to Zeydie's offICE!") She plays notes on the piano in time and turns ...