Programs like “Music for Young Children”, or similar, are great!! These types of programs usually starts accepting children from the ages of 2 ½ -3 year old. Starting off with music lessons that involve hand clapping, singing, call & response and group activities, will help to establish social skills, listening, and learning skills that the child will carry with them into grade school.
Children who has gone through some sort of program like this, are less likely to experience social fears/anxiety when entering kindergarten, because the feeling of being around allot of people, seems familiar. Parents who sit in on the lessons at first, usually leave the child alone with the instructor/group after the first year or so, which also helps with feeling of them being left alone, (some kids don’t even notice you’re gone).
Over the 15 years that I’ve been instructing privately, there is a noticeable different between students who start early, and those who don’t, (there are always exceptions of course).