Welcome to planDisney, Melissa! You will have such a fantastic time celebrating your son's fourth birthday at the Walt Disney World Resort!
You can modify any Walt Disney World Vacation Package up to 30 days before arrival with no penalty and no need to start over from scratch with a new reservation. You can make some changes using your
My Disney Experience account if you have your
Vacation Package linked to your profile. Under "My Plans" navigate to the day of your scheduled check-in date and find your Resort Hotel information. There will be a box to the right of the page that will say "Change Reservation." Anything you can change will have a blue link with the word "change". If you cannot change this information via your account, there will be a phone number displayed you may call for assistance.
Be sure to pick up a complimentary birthday celebration button for your little prince! You can ask for them at the front desk of your
Resort Hotel or
Guest Relations at any
Theme Park. So many Guests and Cast Members will wish your guy a very happy birthday; he will be grinning from ear to ear!
Have a magical day, Melissa
-Rachel