Children under 6 years of age can ride the train for free. You need to have a document certifying the age of the child with you. In this case, the child is not allocated a separate seat on the train.
Children over 6 and under 14 years old can travel at a discount. For their ticket, parents will need to pay 75% of the cost and also present a document proving their age. These include a birth certificate and a foreign passport of the child, as well as a passport of one of the parents, which indicates the year of birth of the child.
Children over 14 years of age pay the full price of the ticket and may travel unaccompanied.