Piano Hobby is the last hobby that you can unlock in The Sims Mobile game. You'll need the Maestro's Grand Piano Family Heirloom to unlock. It is not easy to get this heirloom as you need to level up as high as Player Level 20 to receive it from a retired Sims. For this hobby, you'll compose an opera, read composer's note and biographies and play the piano skillfully. You can unlock the other piano-related objects listed below once you've stepped up. These will grant you additional piano event actions.