We're off! Taking the Train from Brattleboro to D.C.

We caught the train in Brattleboro, VT and are enjoying the country scenery as our train chugs along.
The train whistle blows often and the young boy seated near us asked the question I was thinking, "Why does the whistle keep blowing?!?"
The inside of the train is similar to an airplane; there are tray tables, overhead luggage storage, and bathrooms in the back. Phew!