Teenagers who run away from home to live in the wilderness may become feral. As they become more and more feral, they gain some supernatural powers (a la Peter Pan - ability to fly, things they imagine come true - possibly quite powerful), but at the expense of their humanity and ability to speak, comprehend complex subjects, etc. Maybe they have a leader: the most feral of them all.
A regression into a fantasy childlike state.
The frozen wastes stretch for miles around. Something waddles through the snow. It's a penguin: An emperor penguin. It waddles slowly, meandering toward the sea. The ranger freezes. "Stay very still," he warns. "Don't move at all." "What is it?" I ask, breathlessly. "It's the most dangerous creature in the whole Yahoo Tundra, and that penguin's about to kick its butt..." (Sorry, Epi! I couldn't resist!)