Musically-Inclined.

My little boy has been showing signs of music inclination. This started when he turned 2 and would stop his playtime whenever I played classical and rock music. Then as he was growing up, he would asks me and his dad what the different musical instruments are. Of course, we just had to explain the basic ones as we do not know those technical and specialized musical instruments such as epiphone sg guitar etc... I just wonder if 6 years old would be the right time to enroll him in a formal music class.