KKTW CARD- Key To The World Card 

 

This one you might know already. I did not know this the first time I cruised.

Everything on board is paid for with your Room card. This card is called your Key to the World Card. Everything you purchase on the ship and Castaway Cay will be charged to your Key to the World Card. This includes beverage services, spa, salon services, photography, medical, laundry services, as well as any purchases from the retail shops.

You can arrange that your children do not have charging privileges on their card. When you pay you will need to put down your room number. So make sure you know the number so you can sign the bill... 

There is lots of info on your KTTW CARD. 

1st line are your cruise dates, name of ship "A" for adult and "M" for minor,

Then your name, you Castaway Cay level and number

Folowed by time of your dinner, your dining rotation, your table number

The Big letter to the lower left is your muster station and the number at the bottom is the counter number where you checked in at the terminal