From the very first sentence of a fairy tale, you need to pull the reader into the fantastic world of the story and encourage them to use their imagination.
How? You make the details heightened and fantastic. You don’t set your story in Germany, it happens far, far away where the swallows fly when we have winter. You don’t say the family was rich, you say they wrote with pencils of diamond upon golden slates.
You also make your reader an active participant. You say things like you could tell at a glance how princely they were to encourage them to imagine, and but it did not last forever to get them predicting what happens next.
Have a read.