Marshmallow (1970)

Set at a secluded summer camp, where Morgan (Lawrence), a timid and introverted 12-year-old, is thrust into a waking nightmare when a once-fabled campfire tale becomes real. As a mysterious figure descends upon the camp, Morgan and his newfound friends must embark on a treacherous journey and uncover a sinister reality buried beneath the surface. Little do they know that the truth harbors a secret that will test their resilience and unravel the very fabric of their reality.