B.D.
My son attends Kids & Company Preschool at the Methodist Church in New Lenox, right on Rt. 30 (Maple). This is his second year there and we love it!
I recently found out about a program at Providence Catholic High School that everyone I have talked to raves about. My husband and I are considering sending our son there for Kindergarten since New Lenox only offers 1/2 day and he has a late birthday.
The site for Providence is:
http://www.providencecatholic.org/PCCA/index.html
Choosing a preschool for your child is a hard thing to do (at least I found it to be). Take your time, and check them ALL out. Do not be embarrassed to ask for a walk-thru or if you can sit in on a class.
Good Luck!
Edited to add: There is also Marley Preschool which is located next to Marley Candles/Marley Church off of Rt 6. I know a few families that attend there and they love it as well.