This is not kidnapping. This is the value that the Norway gives to the children.
You can't abuse children in Norway...
That's good of course that Norway protects children because they are most unprotected beings on this planet and suffer a lot in many countries where no one cares about their protection. The dark side of this protection is unappropriate usage of the law. There are always some bureaucratic idiots who will spoil any good intention and that is the case in OP's story.