When friends learn that my nearly six-year-old has been playing violin for three years, their voices shift a bit, especially if they also have a child learning an instrument. Two questions come in quick succession: "Does she like it?" and "How do you get her to practice?" There's a nervous energy to their queries, and usually a little laugh, too. Either they've been struggling with kids who have a hard time practicing, or they recall their own childhood boredom.