Hello Mauricio,
Disney's Perfectly Princess Tea at
Disney's Grand Floridian Resort & Spa is the sweetest experience for all of the littlest princess visiting Walt Disney World. The memories of that day will be priceless to both of you.
Disney's Grand Floridian Resort & Spa has a shop on the second level of the main building. It does carry a few princess gowns, but the sizes and styles vary. You can make an appointment at
Bibbidi Bobbidi Boutique at Magic Kingdom before her tea. She'll have a royal makeover done by her personal Fairy Godmother in training. When she's done, you simply ride the monorail to the Grand Floridian.
If you would like to have a princess gown before you arrive at Disney World you can visit the
Disney Store online, or you can use the
Shop Disney Parks mobile app. You'll be able to place your order and have it delivered to your home. That way she'll be ready to go for her tea party and you won't have to worry about shopping while you're on vacation. You can also use the app while you're at Walt Disney World. You can shop in the app and have your items delivered to your resort, other stores, or different pick up locations that are closest to you at the time.
I hope this information helps. Have a magical trip and thanks for visiting the Moms Panel.