Many parents are aware of the benefits of studying a musical instrument.  I am posting a few below and will add more as I become aware of new research.

• A Better Way to Practice
  
• Child Music Lesson "Leave Lasting Brain Boost"
  
• Is Music the Key To Success?
• Nobel Medicine winner says: I owe it all to my bassoon teacher.
• EMORY: Music may protect against effects of Alzheimer's
• Early Music Lessons Have Longtime Benefits
  
• Sound Research
• Long Term Benefits of Music Lessons
• Musical Training Optimizes Brain Function
• 11 Facts about Music Education
• Music Matters