Many people make a career studying children’s stories as well as folklore. When you investigate their origins, there is often much that we would find objectionable. There are Jewish stories for children which pose few shailos.
If you want to use “cleaned up” folk tales to teach Jewish children, you need to explain what the characters are doing from a halachic perspective (Goldilocks is a thief, but as she is a minor she probably isn’t liable, and if the bears and her are all Yidden, then perhaps it is a situation to discuss hachnasas orchim, and note the stories of rabbanim running after thieves to give them tsadakkah).