It hit 70 degrees in Boston one day in March. What else would we do but go to the beach? We went to Plum Island, and the water was freeeezing, but that didn't seem to bother Cecilia too much. She was able to stand in zero-degree water puddles for long periods of time, and was very intent on pouring water on the castles we made, digging a moat, etc.
The full set of pictures can be found here, but here are a few highlights:
As you can see, we eventually gave up on the pants:
Overall a super great day.