At age 10 most of us are just starting to learn long division, or how much the tooth fairy will leave for a molar. But at that age, Hilary Hahn was tackling Mozart’s 5th Violin Concerto — the same one she recently recorded, she tells us how she knew it was time to put it on an album. Plus Merrily We Roll Along has a reputation for being the Sondheim musical no one can get right. Will the production opening this week at The Wallis break the curse? Those stories and more on the Arts Alive podcast.