|Plot||Big Bird uses a Sound Machine to make strange sounds.|
|Air date||December 30, 1971|
|Season||Season 3 (1971-1972)|
- Big Bird turns dials on his Sound Machine to produce a series of sounds; when you guess what sound it is, a picture of the thing appears on the side of the contraption. Gordon successfully guesses the sound of a rooster and a typewriter, but he can't conceive of the sounds of a cow, airplane, jackhammer, plus wheezings and thumpings all mixed together.
- Speech Balloon: "I" - Ice Cream (First: Episode 0033)
- Gordon appears as the strongman in the circus, and bends a solid metal bar into the number seven.
- Jazz #7 in English (First: Episode 0012) and Spanish (EKA: Episode 0303)
- Molly sings the "Same/Different" Song in English and then asks how two pair of shoes are the same and different. Luis sings the song in Spanish.
- Film: Detective Fred (Joe Raposo) is sent by his boss (Danny Epstein) to locate the number 20. Throughout the office and on the streets of New York, Fred tracks down the numbers 11 through 18 in numerical order by spying his surroundings. When he finds his way to Apartment 19, he discovers it is occupied by a gorilla, who leads him directly to the elusive 20. (EKA: Episode 0277)
- The Country Mouse lives peacefully on the farm when his cousin, the City Mouse, comes to visit. The City Mouse is appalled that his cousin lives in a haystack, eats acorns, and listens to birdsong. He invites his cousin to come visit him in the city.
- The Country Mouse visits the City Mouse's apartment, and finds that his cousin eats pizza, doesn't mind traffic sounds, and listens to groovy music on his stereo. The Country Mouse is startled when he hears a cat. The City Mouse sighs, "Oh, that's just the cat. That means he's hungry, and he wants to catch us and eat us for dinner." Horrified, the Country Mouse goes back to the country, where he's safe. The City Mouse offers the cat a bite of pizza.
- Grover demonstrates near and far in English and Spanish. (First: Episode 0057)
- Gordon appears as the strongman in the circus again, and bends a solid iron bar into the letter J.
- Bob explains that pride is a feeling when you realize that you're a special person for some reason.
- Molly is proud that she has delivered all the mail; a Spanish-speaking kid is proud that he can speak two languages; Oscar is proud that he is the sourest, trashiest, nastiest, meanest Grouch on Sesame Street.
- Bob, Big Bird and some kids demonstrate the concepts of near and far.
- Molly digs into her mailbag, and delivers the letter I.
- Bob explains to Oscar that one can only grow flowers in a flower box with seeds in soil, sunshine and rain.
- Roosevelt Franklin recites the alphabet. (First: Episode 0103)
- Cartoon: A Gary Owens-voiced man attempts to discuss the letter I, but is jeered by an offscreen voice. The man uses him as an example of the word "impolite". (First: Episode 0032)
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