Hello Pia! I am so glad to hear you've gotten a
FastPass+ selection for the Elsa and Anna meet-and-greet. They are certainly popular, aren't they?
Children under 3 years of age are special guests of the princesses. They do not need a
FastPass+ selection for the meet-and-greet or any other attractions at Walt Disney World. When it is your time to enter the
FastPass+ queue, your band will be scanned at the entrance and you and your small children will all be allowed in the line together. If other guests in your party, that are over 3, wish to join you in the
FastPass+ queue, they will need to have a
FastPass+ selection for the attraction as well. It's a very easy process and one Cast Members are very used to. You shouldn't have any trouble at all.
Thanks for asking your question here at the Disney Parks Moms Panel. If I can help you again, please feel free to
let me know. Have a great day.