Hey Howdy Hey Parise and welcome to planDisney!
I bet you all are getting super excited about your trip to the Most Magical Place on Earth just days away! It sounds like we need to address a planning issue with access to the Theme Parks for your nephew before you leave. Let's review a few options with My Disney Experience and then go from there. Giddy up!
One way to handle this scenario especially if your nephew is younger than 13 is to work with his mother on her
My Disney Experience account. She should have a profile for him all set up on her account that she manages. What she can do is go under the "My Family & Friends" section and search for your nephew's name. She should find a button on the right "Settings" which she will click on. As long as your account and hers are linked she should be able to select an option that states "Allow Parise to view all your plans", and "your" references your nephew. As long as this option is checked, you will then have the option under your account to make plans with your nephew's profile. You can also reassign his ticket to his profile which should allow him to tap into the parks using his MagicBand+.
You can also have the Cast Members work on this for you when you are onsite at Walt Disney World. If you visit the Front Desk at your Disney Resorts Collection hotel or Guest Services at the front of the park, they will be able to update his MagicBand+ preferences or at least give you a MagicCard that will allow him access to his Theme Park ticket during your trip. Either way, he should still be able to use his MagicBand+ for your upcoming vacation.
If you are planning to visit EPCOT during your vacation, you are in for a real treat!
EPCOT International Flower & Garden Festival is going on right now and has so much for everyone to experience. The whole park is decked out in full spring colors to get you excited about warmer weather and a new growing season. There are many locations throughout the park to try some unique food and drinks with springtime flavors that many kids enjoy trying. There are also topiaries throughout the park with all of your favorite characters and is a fun way to tour the park getting pictures with all of them!
I hope you can get your nephew's MagicBand+ and his My Disney Experience account fixed before your trip. If you have any further questions, please feel free to let us know, we are always happy to help!
Have a Magical day,
Nick