Event #1: In the book, the Lucy went into the closet and she met Mr. Tumnus (a faun). In the movie Lucy did the same thing. The only difference was the faun didn't cry when he told her he was a bad faun.
Event #2: In the movie, the Snow Queen froze one of their friends, but that part wasn't in the book.
Event #3: In the book, when they where at war with the queen and her army, it didn't seem as real in the book as in the movie.
The Snow Queen and the lion seemed more real in the movie becuase of the action and the sound effects. In the book it was all in my head and I had to mentally imagine their character.