In the movie the fence is electric and you can't touch it. Bruno has to dig under the fence to get to the other side to help shmuel look for his father.
Elsa's and Kurt's relationship in the movie
In the movie they barely have any type of contact in the movie they don't talk really at all except for simple gestures.
the end of the movie
in the movie they go looking for bruno and can't find him and the mother is bawling out her eyes, and gretel is even crying too, and in the end they were too late
the fence in the book
In the book the boys could touch the fence, and shmuel could lift the fence for bruno when he was coming over to help find shmuel's father
Elsa's and Kurt's relationship in the book
in the book elsa is unhappy in her relationship and where she is at so on elsa end up spending more time together and leads up to elsa having a affair with kurt which also leads up to kurt having to move to another camp, and the excuse for that is he failed to inform higher ups that his father fled the countrie
the end of the book
in the book unlike the movie, the family doesn't search right away. and it ends before they do really, and he just with shmuel in chamber