We decided that DD wouldn't go to 3 year old kinder until next year, she turns 4 in March. I made the decision pretty easily but then wrestled with it, wondering if it was the right choice. But having her in a music class one morning a week meant we could see how she was against the other kids of the same age. She's one of the youngest in the class and she doesn't have the same attention span as they do and was taking a bit longer to grasp the theory stuff than the older kids. That cemented my decision to hold her back.