My family is making our first visit to New England. We have four kids aged 2-16 so we need a wide range of activities and things to see and do. We will be mobile but don't want to spend more than a couple hours in the car on any given day. While we would like to see Boston, Plymouth Rock and the mansions in Newport, RI, we are not sure of any other "must see" places.
Suggestions of things to do and routing?