Took DS to music class last week for first time. He cried on and off in the class, which is unusual for him. This week he started sobbing as we went through the door. We had to leave. I have no idea what's upsetting him - I'm with him all the time, he sits on my knee, he goes to nursery three days a week so is used to other kids/singing time. I don't know whether to persist in the hope he'll start to enjoy it or give it up as a bad idea. Any advice, or ideas on what could be upsetting him? He was fine as soon as we got outside!