Taking a train has some distinct advantages when traveling with a baby. It's often roomier than a plane, and it relieves you of driving so you can spend time with your little one. For long trips, you can book a sleeping compartment. Dining is often available, and the crew may be able to refrigerate formula or warm a bottle for baby. Another bonus is that you don't have to worry about tight luggage restrictions.
When traveling on the train, take advantage of the ability to move around. Walking the aisles and sitting in the observation or lounge car can help keep your baby happy. If you can, find two seats facing each other so you can put your baby in the seat opposite.