... there are still a lot of things to do in Boston.
The Museum of Science (on a island on Charles River) is very interesting and for the little and big children (yes, me too) interesting.
The New England Aquarium at Central Wharf is worth a visit, too.
Go shopping or having a small bite in one of the many restaurants.
More museums: Computer museum, Children Museum, Boston Tea Party ship
Favorite thing: Upon our arrival on our second trip, it was literally too cold to snow. However, the night before our flight home, the temperature rose enough to allow the humidity to rise, and there was a fresh layer of snow on the road and cars at 4:45am, when we needed to head to the airport. Oh boy! Nothing like being the only car on the road, except for the snow plows and sand trucks.
Favorite thing: NOT MY FAVORITE THING: Boston gets COLD in the Winter. It's not just the cold that'll get you but the wind. If you visit in the Winter, bring hats, gloves and layers of clothing.