Blue, Sprinkles, and Joe have a sleepover in Blue's Room, but Sprinkles can't sleep, so Blue shows her their friends' favorite ways of getting ready for bed - Roary reads, "How Do Dinosaurs Say Goodnight," by Jane Yolen and Mark Teague, Doodleboard plays Doodle Doodle Dream and draws stars and an owl, Joe counts a total of 14 Borises riding on bikes, and Blue sings herself a lullaby. All of those sleepy games put them to sleep, but not Sprinkles.
This is my favorite Blue's Clues franchise episode in the whole wide world. I'm kinda bummed Fred never appeared, so I added her. I also gave Blue and Sprinkles rails for their beds since before kids turn 10, they have to sleep in beds with rails.