Science!
If you haven't been lately, can I just say that the Boston Museum of Science remains awesome? Joanna and I made a quick stop on Saturday to see some of the newer exhibits that we hadn't seen yet, and it was a lot of fun.
The new Triceratops (Cliff) is quite awesome, well worth seeing if you're into that sort of thing (although he does make the old model of a Triceratops look kind of depressed next to the real one), and the temporary exhibits (Frogs and Mythical Creatures) were both also very cool. They have provided a dizzying array of interesting frogs, and the mythical creatures exhibit does a great job of explaining the root causes of all those mythical creatures you may remember from the Dungeons and Dragons Monster Manual.
Plus, if you go now you'll have the added bonus of not going on the last weekend of February break like we did, so the herds of screaming children will likely be a bit smaller.