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InItaly,it’scalledilgiocodelcucù.
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Summary
A TED-Ed video explaining the cognitive and social reasons babies love peek-a-boo, from object permanence to the roots of human conversation.
Key vocabulary
object permanencecognitivecaregiversinfantssocial smilingimpulse controltheory of mindjoint attentionbarrierhallmarks
Grammar notes
Present simple for universal/scientific facts — Used throughout to state findings that are always true: "Peek-a-boo is a near-universal source of laughter and connection for infants and adults."
Passive voice for research reporting — Academic findings are presented without naming who did the action: "11-month-olds were shown a barrier, the bottom of which was hidden behind a screen."
Non-defining relative clause — Adds extra information about a noun without restricting its meaning: "Swiss psychologist Jean Piaget… And while most modern researchers agree this process is more fluid than Piaget believed…" (also: "the bottom of which was hidden behind a screen")
Fronted adverbial for contrast — A time or condition phrase is moved to the start of the sentence to highlight contrast: "Before object permanence, this disappearing act can range from confusing to pleasantly surprising."
About this video
This TED-Ed animation explores why peek-a-boo — known as il gioco del cucù in Italy, ba' 'éno in Palestinian Arabic, and inai-inai-ba in Japanese — is a near-universal game that virtually every infant plays. The video traces a clear developmental timeline: from newborns recognising faces at just two days old, to babies mastering object permanence between 4 and 7 months, to the "peak peek-a-boo performance" window around 9 months when infants can predict the timing of the reveal and actively search for a hidden face. A memorable study with barriers and toy cars illustrates how babies who see their expectations violated actually become more interested in the surprising toy — a concrete detail that brings the science to life.
For shadowing practice, this video is excellent material. The narration is delivered in a measured, broadcast-quality American accent at a comfortable pace, with clear sentence boundaries and natural pauses between ideas. The language moves smoothly between academic vocabulary (e.g., object permanence, theory of mind, joint attention) and vivid everyday phrasing, giving you practice with both registers in one short text.
This video suits B2–C1 learners who want to build academic and scientific English alongside natural spoken rhythm. Shadowing it will sharpen your pronunciation of multi-syllable terms, your control of contrastive stress (e.g., "not just confusing — but pleasantly surprising"), and your feel for how English transitions between complex ideas with minimal fuss.
Idioms & expressions
out of sight, out of mind — if you cannot see something, you stop thinking about it exists; used literally here to describe how babies think before object permanence develops
wind up (doing something) — to end up in a situation, often without planning it: "as adults they'll likely wind up playing peek-a-boo again"
sprinkled with — containing small amounts of something mixed throughout: "even the most cooperative pretend play is often sprinkled with peek-a-boo style surprises"
serve and return — a metaphor borrowed from sport describing the back-and-forth exchange between a caregiver and baby
call and response — a structure where one person's action prompts a reply from another, like in music: used to describe the format of peek-a-boo
in favor of — choosing one thing over another: "ignoring new objects in favor of toys that challenged their expectations"
working together — functioning as a coordinated unit: "by 9 months, these developments are working together for peak peek-a-boo performance"
