Mom, I teach young children and I'd give it 3-4 weeks more for him to adapt to the new environment, teacher and classmates. You may want to send a note for his teacher, or e-mail her and let her know your concerns about his crying and upset over no friends yet. She well tell you what she has observed so far with your boy, be sure to ask for suggestions to help him. I would not put any stock into his the "toys are boring comment" ; the first few wks the teacher is getting to know all of the children in their class and likely assessing behavior, the children''s basic knowledge and establishing class rules and authority. Academics will likely not truly begin for a week or so. In the mean time, I would give your son some lessons on introducing himself to other kids in this class who are nice to him by asking them to play at free play time. Kids at this age often are a little uncomfortable in a brand new environment that is more structured than they have ever been in b4. He can also ask kids to play with him at recess time too. If things are not better in 3wks I would call and set an appt with his teacher to talk to her about your concerns. Your son should not be present at this meeting, maybe a mtg after school or early b4 school begings. Get her opinion and input on how he is doing then make a decision about what is best for him. Although you say he is quite social, is your son mature for his age, or not especially? If not ,he may need another year at a real preschool where the setting is more structured with some academics, but they still do lots of playing too. Sometimes little boys and some girls at this age who have late b-days, are not ready for kindergarten so soon after turning 5; this is always evident until they start. If the teacher tells you he is not ready in a few wks it may be in his best interest to keep him bk anothe yr. She will tell you if she see's your son can not adjust to kindergarten. A fair amount of self control, ability to adapt to structure and focus is needed in kindergarten. There is nothing wrong with this if this is the case with him. Hope this helps Mom.