1. Save Money!
This is the reason parents love most. Cruise ships, unlike hotels, charge by the number of passengers sharing a cabin - period. The cost has nothing to do with age. At many resorts, once your child turns 13 they will need to pay the "full boat" adult rate. On a cruise ship, the first two passengers in the cabin (aka - mom & dad) will pay first and second passenger rates. No matter how old your children are, if they are sharing the cabin with you they will pay 3rd, 4th, 5th passenger rates which are lower (aka - kids rates). Of course the number of passengers sharing the same cabin is dependent on the occupancy limits of your particular stateroom. Also be aware that when a cruise line offer "perks" like free drink or specialty dining , this discount applies to the first and second passengers only. Any additional passengers sharing the cabin would need to pay for the cost of these perks.