Penny, it should be a lot of fun to introduce them to the joys of cruising! We have been to all the ports before, but they are good "beginner" ports. St. Martin is interesting because of the Dutch and French sides. We love the train ride on St. Kitts. It's fun as well as informative. Labadee is all about relaxing and/or having a blast, whatever they want to do. I'm sure we will go to a fort in San Juan.
Gosh, I get excited just thinking about it. I don't want to wish the next 7 months away, but look forward to all the planning and stuff. They are excited about getting passports! I remember that thrill, too.