Congratulations on your upcoming first cruise with Disney!
The Western Caribbean cruise takes you to
Key West, Cozumel, Grand Cayman and Castaway Cay.
Key West:
Conch Republic Tour, Old Town Trolley, Glassbottom Boat, Pirate Soul, Key West Butterfly, Pirate Scavenger Hunt.
I would recommend the Key West Butterfly and Nature Conservatory with Aquarium. Young kids can explore rather than have to sit through a narrated tour.
Grand Cayman:
Island Tour, Nautilus Undersea Tour, Seaworld Explorer, Rum Point Beach, Seven Mile Beach, Boatswain’s Adventure Marine Park, Dolphin Observer and Turtle Farm, Island Tour and Butterfly Farm.
I have been to the Turtle Farm but the Island Tour may be less than exciting for young kids. Time at the beach is usually a great choice for young explorers. For more fun, consider
Boatswain’s!
Cozumel:
Luxury Yacht Charter, Cozumel Ruins and Beach Tour, Ocean View Explorer Tour, Cozumel Highlights, Cozumel Beach, Dolphin Discovery Observer, Dolphin Observer at Dolphinaris and Xcaret.
Some excursions such as Xcaret, I would rule out just because of the length of the tour. My favorite tour is the Tulum Ruins but that will have to be when your twins are a bit older. While they could go on the Cozumel Ruins tour, strollers are not allowed.
Here, I would suggest enjoying the beach. Also, please check with DCL to see if this port of call will be skipped due to the flu advisory.
Castaway Cay involves a day in paradise. Enjoy the beach, buffet lunch, take a bicycle ride (child seats available) and have pictures with some beach-attired Disney characters.