only the Germans would have thought those kinds of stories appropriate to read to a child before you put out the light, and leave him or her wide-eyed and trembling in a cold, dark bedroom.
There is no locution in English which is "the simple tale."
There is no way for a native speaker of English to know what you mean by that term.
Ok, like The Complete Grimm’s Fairy Tales, the stories in it are simple tales, and they are told to children and adults. The right expression should be fairy tales which people can understand what I mean. is it right?