"The children walk in through the door."

Translation: Børnene går ind ad døren.

[TimothyRevell]

Does "Børnene går i gennem døren" not work here?

[DoroteaTheFruit]

Asked a native speaker... Yes! Both are correct and both are being used.

[MaikHummel]

So what would be a case where you had to use either one of them specifically? Are they always interchangable or is there a difference in where they are used?