Hi there, Rachael!
Thanks for bringing your great question to the Disney Parks Moms Panel. You are going to have such an unforgettable vacation at the Happiest Place on Earth.
It sounds to me like you are pretty familiar with FastPass+ at the Walt Disney World Resort in Florida. When reserving FastPass+ return times prior to your vacation on
My Disney Experience at Epcot, Disney's Animal Kingdom Theme Park, and Disney's Hollywood Studios, you will notice that attractions are listed in two tiers. You are allowed to select one attraction in Tier 1 and up to two attractions in Tier 2 to complete your initial three FastPass+ selections prior to arriving. Currently Magic Kingdom Park does not have tiers, and you are able to select any three available attractions from the list. In Disney's Hollywood Studios, you are allowed to select one attraction from Toy Story Land and in Disney's Animal Kingdom Theme Park you are allowed to select one attraction in Pandora - The World of Avatar in Tier 1. Over in Epcot, Tier 1 consists of Frozen Ever After, Illuminations: Reflections of Earth, Meet Disney Pals at the Epcot Character Spot, Soarin' Around the World, and Test Track.
If you are vacationing to the Disneyland Resort in California, you will notice a few major differences in the Disney FASTPASS system from FastPass+. At the Disneyland Resort, all FASTPASS selections are made on the day you are in the park and not prior. Since you may only select one FASTPASS attraction at a time at the Disneyland Resort, there are actually no tiers. I absolutely love making FASTPASS selections at the Disneyland Resort using Disney MaxPass on the Disneyland app. This allows me to digitally select FASTPASS attractions all day, and I find that I can experience more than ever before.
I hope this helps, and please return if you have any other questions. Have a magical day!
-Jennifer