On a night with a blue moon filling the sky, a moon fairy named Moona appears outside the Blue's Clues house and tells Blue a story about her birth under a blue moon, with a key that will unlock her greatest gift. We follow Moona to find this key and once we have it, a great hunt all over the Blue's Clues house begins to find the lock that it fits. Once that's found, the key unlocks Blue's Room, a special playroom where she is able to talk. Here, Blue can meet lots of new friends, but the most important thing about it is that she can communicate orally. We take part in games such as Boogie Woogie, Dress Up Chest, Silly Seat and Doodle Board.
This was the last episode to use the previous season's intro, but in variation.
This episode does not include playing Blue's Clues, Mailtime, Video Letter, and Skidoo segments in this episode.
This is the first episode for Season 6 and to air in 2004.
This is the first episode to have Moona appear for this season.