I love it when they take the short stories and enhance them , they often come out even better than the written shorts, 1408, Mercy, and especially Riding the Bullet, and Big Driver.That explains how they're gonna extend it to a full film, it isn't just about the school anymore but the whole town.
It's a nice story. It should have been in Night Shift or Skeleton Crew rather than Nightmares and Dreamscapes in terms of tone. I guess the movie will have to delve deeper into what the children actually are, the story doesn't specify.
If I had to guess which of his stories was most likely to be adapted, this one would have been near the bottom of the list. Like Gerald said, some of the short(er) stories make some of the best adaptations, ought to be an interesting experiment.This story is like, 10 pages in paperback, how will it be turned into a full length feature film?