In & Out, Up & Down is a Sesame Street book about opposites.

• Ernie and Rubber Duckie: In and Out
• Prairie Dawn and Cookie Monster: Up and Down
• Big Bird and Little Bird: Big and Little
• Grover, Prairie Dawn and Herry Monster: Open and Closed
• Grover, Herry, Cookie, Ernie, Bert and Prairie Dawn: Standing and Sitting
• Bert and Oscar the Grouch: Clean and Dirty
• Herry: Straight and Crooked
• Bert and Ernie: Wet and Dry
• Cookie Monster: Full and Empty
• Grover: Front and Back
• Frazzle, Ernie, Herry, Grover, Lefty, Betty Lou and Bert: First and Last
• Rodeo Rosie and Betty Lou: Over and Under
• Ernie and Bert: Asleep and Awake