We'd shown him Episodes 4-6 (A New Hope, Empire Strikes Back and Return of the Jedi) and he loved them. He was Han Solo for Hallowe'en.
His favourite part of Disney was the Star Wars portion.
This was his first experience of a movie as part of the mega-fan crowd. He got dressed up in costume and applauded along with the rest of the crowd during the opening credits.
Watching him get swept away by The Force Awakens was better than the movie itself. (And I really liked the movie, so don't think that's dim praise.) His eyes were wide, he gasped, he laughed. For over two hours, he wasn't Nathan, he was swept up and became Finn and Rey and Kylo Ren.
That's a magical experience and one I'll treasure for the rest of my life.