We enjoyed the Duck boat tour we went on.
You should eat at Durgin Park (check the We Met QSis--something like that--thread.
If you want the phone number for a great cab driver, just PM me. He can't fit all 14 of you, but if just a few of you want to go somewhere, he is a great guy. He charges a set fee.
Also, to save on hotel charges, we stayed in Quincy, which is just outside of Boston.
Oh yes, if you are interested in history, Plimouth Plantation is nearby. We didn't get a chance to go there, but I have used their website to teach my classes about the pilgrims.