Child of Glass (1978)

"A boy continues to see a ghost of a Creole girl and he has to help her solve a riddle... otherwise he might be haunted for the rest of his life!"

Alexander Armsworth and his family move to an authentic antebellum mansion which once was owned by a river pirate. Alexander is drawn into a century-old mystery when he sees the ghost of a little girl and she asks for his help in finding the "child of glass" by reciting a riddle. He has only a day or two to solve the riddle...or be haunted for the rest of his life!