Hello, Sepideh! Thanks for bringing your questions to the Disney Parks Moms Panel!
Celebrating a child’s birthday at the Happiest Place on Earth is beyond magical! If you only plan on visiting one park for your daughter’s special day, then I would definitely choose Disneyland Park. You will discover a multitude of attractions that the whole family can enjoy, characters to meet around every corner, the Pixar Play Parade in the afternoon, and fireworks at night. To look up exact show times and locations and times to meet characters, download the free Disneyland app. The app will be your best tool for navigating the park efficiently during your one-day visit.
Disney FASTPASS Service is included with your theme park admission and is available only for select attractions. Most attractions that offer FASTPASS have at least a 40” height requirement, but there are a few attractions that offer this service that anyone, including young children, can ride. To obtain a FASTPASS, visit a distribution kiosk for the attraction you want to ride. Insert the theme park ticket for each person in your party and a FASTPASS reminder ticket will be distributed with a one-hour return window. When it’s time to ride, scan your theme park tickets at the touchpoints as you enter the attraction and enjoy your short wait to ride. If you would like to obtain FASTPASSES on your mobile device, upgrade to the Disney MaxPass option for an additional fee per ticket.
I hope this information was useful. If you have any other questions, please stop by again!