Nighty-night! Big Bird is excited to sleep in the new pajamas Granny Bird gave him. When But Big Bird is still uncomfortable, though, and Gordon pulls out more objects, including the letter C, a cactus, a number 1, and a pineapple. But something is still bothering Big Bird. Just then, the Princess from the Princess and the Pea story arrives (she moonlights as a sleep consultant)! Through scientific inquiry, she investigates and discovers a pea. Gordon tucks him in, Big Bird complains that there is something bothering him in his nest. It's a toy truck, which Gordon removes.
But Big Bird is still convinced there is something in his nest. Finally, Gordon realizes the problem—it's the tag in Big Bird's cozy new pajamas.