Peek-a-boo

Peek-a-boo (or peekaboo) is a form of play often played with an infant. To play, one hides their face, pops back into the view of the other, and says "peek-a-boo!", sometimes followed by "I see you!." Peek-a-boo uses a basic joke-like structure of surprise, balanced with expectation. The game is thought by developmental psychologists to demonstrate an infant's inability to understand object permanence.

Appearances

Oscar and Georgie play peek-a-boo in Episode 1178.
Elmo and Shelley the Turtle play peek-a-boo in Episode 2300.
Telly and Baby Natasha play peek-a-boo in Episode 2475.
Shelley and Barkley play peek-a-boo in Episode 2622.
Oscar and Gabi play peek-a-boo in Episode 2681.
Oscar and Irvine play peek-a-boo in Episode 2737.
Maria plays peek-a-boo with Baby Natasha and Oscar plays peek-a-boo with Irvine in Episode 2851.
Picabo Street and Elmo play peek-a-boo in a celebrity insert in season 26 (First: Episode 3301). In another insert, Telly Monster meets Street in a "Monster on the Spot" segment, though he thinks he's looking for a location called "Peek-a-Boo Street." (First: Episode 3312)
Humphrey plays an extended game of peek-a-boo with Baby Natasha in Episode 3613.
Baby Natasha plays peek-a-boo in Episode 3643.
Big Bird remembers playing peek-a-boo with Radar in Episode 3884.
Humphrey and Baby Natasha play peek-a-boo in Episode 3871.
Big Bird and Baby Natasha play peek-a-boo in Episode 4020.
Big Bird and Snuffy imagine themselves playing peek-a-boo in Episode 4132.
Abby Cadabby plays peek-a-boo with Marco in Episode 4145.
Ralphie plays peek-a-boo in Episode 4155.
Peter Piper plays peek-a-boo in Episode 4511.
Sweetiekins attempts to start a game of "Worm Peek-a-boo" with Oscar in Episode 4701.
Mr. Noodle's brother Mr. Noodle plays peek-a-boo with Baby Natasha in the 2000 episode Elmo's World: Babies.
In an episode of Play with Me Sesame, Ernie instructs the viewer for them to play peek-a-boo with Ernestine.
In Sesame Beginnings: Beginning Together, Brandy plays peek-a-boo with her daughter, Sy'rai. Later, Prairie Dawn's Mom makes the game a fun way for Baby Prairie to get dressed.
Mr. Noodle's brother, Mr. Noodle, comes up with peek-a-boo as a game he could play with a baby in the 2017 episode Elmo's World: Babies.
The "Abby's Advice" segment on becoming a big sibling includes the advice of playing games like pee-a-boo with your younger sibling.
In "My Sesame Music: Games," Grover plays one of his favorite games - peek-a-boo.