The Pit (1981) 

Twelve year-old Jamie Benjamin is a misunderstood lad. His classmates pick on him, his neighbors think he's weird and his parents ignore him. But now Jamie has a secret weapon: deep in the woods he has discovered a deep pit full of man-eating creatures he calls Trogs... and it isn't long before he gets an idea for getting revenge and feeding the Trogs in the process! - IMDb

 

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