My family (husband and two teenaged daughters) will be in Boston for 4 nights beginning July 7. We are staying at the Hyatt Place Hotel in Medford. We are hoping to use public transportation as much as possible. So.... Any suggestions on what we can do, where we can go, any good day trips? We like the historical sites, shopping, and being outdoors. Our trip also includes a stop at Cape Cod and Bar Harbor, Maine. Any suggestions, helpful hints would be most appreciated! Thanks!