Do I need to book a ticket for my 4-year-old child? JeanetteAuthor A Do I need to book a ticket for my 4-year-old child? Yes, you need to book a child ticket. Infants aged 0-3 years are free but need to be registered when booking. Related articles How to celebrate May 17th like a true Norwegian Explore icy magic: Five fun facts about huskies Why Lofoten is one of the best places for kayaking