DS is 3.6 and has been going to the same nursery a couple of days a week for about two and a half years now. Both last week and this morning he has been saying he doesn;t want to go and getting tearful at drop-off time. Previously he had been happy and would come home chattering about his playmates etc. I asked him why he doesn;t want to go but he just says he doesnt want to. ANyone got any ideas on this?