I suggest you ignore the negative reviews of this film as the writers seem to have an agenda. The script is very good, the acting is excellent and the direction is very good as well.
For children old enough to have learned about the war and the holocaust in school, this is a very useful film as the three main characters for almost the entire film are three children. It is true that at the beginning and end of the film there are scenes in the present day and we see the children now as older adults, however, these two scenes together probably account for less than five minutes from the entire film.
There is one short scene in the film when violence is shown (not involving any children), however, considering it is a holocaust film, that is rather minimal.
Although the Nazis are shown as the monsters they were, we also see it from a slightly different perspective: one of the children is German and one of her parents is sympathetic to the Nazi government, though this parent also shows sympathy to some of the Jewish children.
While this film might be enlightening for young people, it is also well suited to adults. This is not specifically a children's film. Rather it tells an interesting and somewhat unusual story about a specific incident in history (I have no idea if the story is about real people).
If you are interested in this unfortunate period in history, this would be a fine addition to your film library.
