Welcome Aboard, Emma!
Thanks so much for stopping by the Disney Parks Moms Panel!
When you check in at the port, you'll be issued a Key to the World Card. This card will serve as your stateroom key, boarding pass, and shipboard charge card. Since the Disney ships operate on a "cash-free" basis, all your shopping and room charges will be made with your Key to the World and charged to your stateroom.
When your cruise comes to an end (I know, I know - it's so sad!), you'll swipe your card one last time as you disembark. After that, you're more than welcome to keep your Key to the World as a souvenir of your magical Disney Cruise Line vacation. (I'm sure some Disney Cruisers have quite the collection!)
You're sure to find plenty of other awesome souvenirs in the onboard shops or in the beautiful ports you'll visit on your sailing. If your itinerary visits
Castaway Cay, make sure to do some shopping for exclusive Castaway Cay items only offered in the island shops.
Hope you have a magical day! - Diane W.