Your site is beautiful! Did you take that picture with the Boynton books. It's a perfect logo/home page photo.

The only thing that stands out to me that potentially might throw people off is your hours of operation. Most people won't be able to do a 4pm pick up if they work. Especially considering you're in the burbs and often parents will be working downtown, I'd say that 5:30 is a more reasonable time to remain open.