If you need to research preschools and don’t know where to start, check out the Warmlines Preschool Guide. It was a lifesaver for me. It profiles 130 part-day programs, for ages 2.9 to entering kindergarden, and covers Allston, Belmont, Brighton, Brookline, Needham, Newton, Waltham, Watertown, Wellesley, and Weston. Warmlines is a excellent organization, offering information to families about parenting, child care services, and childhood education.