The Connecticut Institute for Communities is opening its fourth Early Childhood Education Center today.  An open house is being held at the 29 Park Avenue location at 3 this afternoon.  The center serves the children in the Head Start and School Readiness programs, which are intended to prepare low-income children under age 5 for school.  The new center has seven preschool classrooms and will serve 140 students.  CIFC President and CEO James Maloney, director of early learning programs Nicole Taxiltaridis, staff, parents and local officials are expected to attend this afternoon's open house.