E.S.
We are in Lombard and I'd be happy to arrange a playdate with my daughter and your son. She'll be 3 at the end of November. But I have an even better idea..if your son loves to be with other kids, the preschool we go to has a 2 year old room. I put my oldest through there - the 2 year old, then 3 year old, then 4 year old and she has some great friends that she is now in kindergarten with that she has known her "whole life". My 2 year old is in the 2 year old room now and is also making great friends. She goes M-W-F from 9-12. You can also do Tues-Thur from 9-12. It's relatively inexpensive, the other parents that go there are great and also encourage playdates, and I really can't say enough about the school. You can PM me for more information if you are interested.
Welcome to Lombard!