I signed up for class because I received it as a gift from a friend. My son was six months old and I really thought he was too young for it. However, I have completely changed my mind after seeing him blossom in the class. At the beginning I didn't think he was absorbing anything, but after a few classes I could tell that he recognized the songs. If he was screaming in the car, I could put on the CD and immediately he would stop crying and listen to the songs.