Infants below three years travel free of charge but have to share a seat with an adult.
Children under 9 years old, with a height that does not exceed 150 cm, are entitled to a reduced fare and can get a shared bed ticket (No seat number). Child tickets can be arranged only for non-instant confirmation offers. For safety reasons, children are only allowed in lower berths.
We do not recommend purchasing e-tickets if you are traveling with children.
Child fares are unavailable, so you might end up with upper berths for them, which is not allowed.