J.C.
My son's (former, he's 8 now) licensed home daycare provider, who is amazing, has openings for that age if you are interested in a home daycare setting. Her name is Gaby Serratos, and I can't say enough great things about her. She lives near city hall on Taylor and she has openings because she's recently moved back to the area after moving out of state for a few years to be close to her parents.
Email me if you want more info - I don't have her contact information handy.
There are lots of great preschool options in Oak Park. I'm not sure from your post if you are looking for a full-day option? We think Pilgrim is wonderful, and priced very well, but their program is 4 half-days with no after-care.