Thirty minutes is often the ideal length for a bedtime story. It's long enough to fully disengage your mind from the day's concerns, but short enough that most listeners are asleep well before the story ends. If you find yourself consistently falling asleep 15-20 minutes into a story, a 30-minute tale gives you plenty of runway.
These medium-length stories have space for richer world-building and more developed narratives than shorter tales. You'll find yourself drawn deeper into the story's setting — a medieval castle, a mythological underworld, an ancient trading route — which is exactly the kind of gentle mental engagement that leads to sleep.
Like all Otherworld Tales stories, each one can be paired with ambient soundscapes. Set the ending to "Continue Sounds" so your chosen ambient layer (rain, fire, forest) keeps playing seamlessly after the narration ends.