Welcome back, Donnette! Thanks for stopping back with the second part of your question. Yes, besides birthdays, Disney Cruise Line is happy to help you celebrate any special occasion, including graduating seniors. Boy, are those seniors lucky to be setting off on a Disney Cruise as a special graduation gift!
When you call Disney Cruise Line to add the note about your birthday and your 2-year old's birthday on your reservation, please also let them know you'll be celebrating your two seniors! They'll add that note to your reservation. Once onboard, check with Guest Services where you'll get your birthday buttons, for "I'm Celebrating" buttons for your seniors to wear. Then, chat with your servers at dinner and ask them about the possibility of recognizing your graduates with a special dessert one night, much like they'll do when singing and presenting a dessert for birthday guests.
Other than that, you can make your own magnets and print them out on magnetic paper for your stateroom door. You'll see many guests do this. Birthday celebrations, graduations, anniversaries and other occasions are celebrated by guests by designing their own fun magnets with which they decorate the door. Plus, it helps your door stick out in a hall full of similar looking stateroom doors! Also, check out the celebration packages available on
Disney Cruise Line's Gifts and Amenities page. You might consider ordering from there to surprise your graduates with a special treat onboard.
Have fun as you continue to plan, Donnette!