The playground is a masterpiece by the great Ray Bradbury. Bradbury takes something that is innocent and a symbol of a happy time and crafts a story full of mystery and terror.
He does not need to show gory details. Bradbury uses implied suspense to terrorize the reader. Track down this short story. It is well worth reading. My only warning is that you will never look at a playground the same way again.
This story belongs in...the Peril of the Short Story.