It may seem like you spend a lot on the pass at first, but it saves the hassles and your money. For instance, if you get lost or miss your train schedule, you can just jump on another train and continue your journey.
Make sure you fill in the correct information. Once confirmed, you can’t change the details.
If your kids are from 0 – 5 years old, they can travel free of charge if they don’t occupy separate seats.