Morally uplifting children's stories?

The parents of the children from the Colorado elementary who were shown a video of the opera Faust claimed that their children had been traumatised. I guess it would have been better if they had stayed at home and read The Lord’s Word – there are so many morally uplifting stories about children there, after all. For example, there is the classic about the prophet Elisha in 2 Kings 2.23-24:

And he went up from thence unto Bethel: and as he was going up by the way, there came forth little children out of the city, and mocked him, and said unto him, Go up, thou bald head; go up, thou bald head. And he turned back, and looked on them, and cursed them in the name of the LORD. And there came forth two she bears out of the wood, and tare forty and two children of them.

What is the moral lesson to learn from this story, I wonder? That, and who prays for the children of Bethel?