We took a Boston By Foot tour of Beacon Hill. It was VERY informative and interesting. It was a walking tour that took about 90 minutes. Our group was small, just our family of 4 and another family. The tour focused on the architecture and some of the people who lived on Beacon Hill
For more information on the tour try this: http://www.bostonbyfoot.org/tours/Beacon_Hill
Above are some of the pics.