Do you cross paths with any other parents there? Playdates with a child he could become familiar with outside of school maybe, so that he could have that recognition he has with his cousin. As tight as it may sound, he'll probably get over it because he's young, I wouldnt take him out till he's older though because that wont make it any better when he goes back, I remember hating playschool with a passion, i was there back in the day when it was easy for me to runaway and go back home and I clearly recall doing it. I hated the first year of primary school too.