A.J.
Hi A.,
Try Sunrise Montessori if you are in the Glendale area (2 campuses) - although if memory serves me correctly they don't actually start pre-school until the child is fully potty-trained. They do have earlier child care. I LOVED the facility, the teachers, caregivers, and owners. I think they have partial week and full week options. We would still use them for extra or summer care if we were in the area.
Do a yahoo/google search for "sunrise montessori" - not to be confused with Sunrise Preschools of which I know nothing.
Good luck!! =)