On our standard sightseeing cruises we have only 2 ticket categories:
child ticket: age 0-2 (accompanied by an adult with a single ticket), you need one single ticket for one child ticket
single ticket: age 3-
There might be other ticket categories on certain special boat cruises that is indicated during the purchase process.
Third party partners, like Getyourguide, Viator/Tripadvisor, Musement, Booking, etc. will not issue you a child ticket.
