In my humble opinion, Coraline is one of the best movie adaptations out there because it actually strays away from the book a lot and adds/changes several different things, but it does so all for the sake of a visual medium which is exactly what a movie adaptation should do!
There’s nothing showing the Beldam making the doll but darn it if that’s not the most aesthetically pleasing scene in stop motion animation:
The appearance of the tunnel is never described (other than it being musty and her feeling a force behind her) so they made a psychedelic tube:
In the book, she meets the three ghost children at a generic picnic but the movie, for reasons I will always love, decided to show them against an animated, interconnecting, version of the Starry Night:
The blue hair, the garden, the world falling apart—
Everything is tweaked to be more visually pleasing.
Which is the point of turning a book into a movie in the first place!
