There's a famous criticism Rav Hirsch had about fairy tales- I think he was responding to the Grimm Brothers specifically. He says that reading such stories are very bad chinuch, since it affects our ability to understand and believe midrashim. (Ex: How can kids differentiate between a story about Og king of Bashan who was a giant, vs. [lehavdil] Jack and the beanstalk with a giant? It gets very confusing.)
I've seen this criticism numerous times over the years and have heard people reference it. But I haven't been able to find it.
Even while checking through the volume of Collected Writings dealing with education (I think vol. 5?) I didn't find anything about this topic (I checked most of the work.) I even found him making reference to a "Cinderella" situation, such that he clearly was familiar with them.
Can anyone shed light on this topic? Thanks!