FFP and ADR

What are the hardest FPP to get? Im starting to plan for my april trip. also some dining experiences that would be good for a 8 year old boy.

In my experience, the hardest fast passes to get are Flight of Passage, Frozen Ever After, and 7 Dwarfs Mine Train. I have two sons (8 & 6). They loved Garden Grill, Sci-Fi Diner, Be Our Guest for dinner with the Beast, and Whispering Canyon cafe. They were not as impressed with 1900 Park Fare.