Hello there Jonathan! Welcome to planDisney!
How exciting that you will be celebrating your little Mouseketeer's birthday! I can't think of a more magical place to celebrate than the
Disneyland Resort.
In terms of the room upgrade request, you would need to check with the site that you booked your reservation through. My suggestion would be to locate your confirmation email of your booking, and contact their customer service email address or phone line.
Did you know that you can pick up a
complimentary birthday button while you're at the parks? You can visit City Hall on Main Street, U.S.A. in
Disneyland Park or Guest Services at
Disney California Adventure Park and ask for your birthday button. You can write your son's name on it, and I'm sure he will get some special shout-outs from Cast Members and fellow Guests throughout your trip!
There are also a ton of places to grab a special birthday treat during your visit! I highly recommend stopping by
Candy Palace and Candy Kitchen in Disneyland Park or
Trolley Treats in Disney California Adventure Park to browse their delicious treats. There are so many yummy options such as cupcakes, cereal treats, or our personal favorite, the Peanut Butter Square!
I hope this information is helpful for you, Jonathan! I'm wishing your son the happiest birthday,
please come back to planDisney if there are any other questions I can help answer.
Have a magical trip!
Melissa