How Young Is Too Young for Guitar Lessons?

I was asked this question from the mom of a possible student. She was wondering if her 6 year old son was too young to start guitar lessons. In my opinion, children can start learning and understanding music as early as 5 months old. One of my friends is the director of Music Together / Colombia Ridge here in the Camas/ Washougal WA area. We've had quite a few conversations about early musical development in pre schoolers. She and Music Together believe that there is music inside all of us,...