Hello Rebecca!
I can see that you are in the middle of planning your next
Walt Disney World vacation! I just went through something similar this weekend when trying to add my sister to My Disney Experience Account for a future Walt Disney World vacation.
I have two recommendations for you which should both work for your situation. Open your
My Disney Experience Mobile App on your phone and sign in. Press the hamburger menu (the three lines) on the lower right of the app's home page. Another app page will open, and then scroll down to locate the
My Profile link near the bottom of the page. Press on the
My Profile link to see your information show up. You will also see a
Family & Friends List on the top right of this app page. Press the
Family & Friends List, and then you will see all of the family and friends linked to your My Disney Experience Account. Find your son's accounts, press one of your son's accounts, and press
Change Character. Then you can select a different character to be on the profile of each of your son's accounts so you can tell them apart visually. The other option is to choose your son's original profile from when he was younger and change his age. You can do this by selecting his original account and selecting
Update Info which will let you change his age to 18+. Then you can go to the other newer profile you made and select
Remove from My List to delete this profile.
I hope that your upcoming Walt Disney World vacation is extra magical for you and your family!
Marc L.