What is serve and return with babies?
Serve and return is the back-and-forth between a baby and a caring adult. Your baby "serves" with a look, a coo, a kick or a point, and you "return" it with a smile, a word or a touch, then wait for their next turn. Harvard researchers say each round strengthens connections a child later uses to talk and learn.
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What serve and return means
Watch a three-month-old for one minute. They lock eyes with you. They kick. They make a small "ahh." Then they wait, looking at your face. That "ahh" was a serve. Whatever you do next is the return.
Researchers at Harvard's Center on the Developing Child named this back-and-forth "serve and return" and compare it to a game of tennis. A baby babbles, gestures, cries or looks. A caring adult answers with eyes, words, a touch or a smile. Then the baby takes another turn. Harvard says these exchanges are essential, and that without them the brain's architecture does not develop as expected. You need no equipment. Just your face, your voice and a few seconds of patience.
Step by step
- Notice the serveWatch for a look, a sound, a kick or a point, and share what your baby is focused on.
- Return itSmile, nod, comfort, or pick up the thing they're looking at.
- Name itPut words to it: "That's the cat!" or "Those are your toes."
- Wait for their turnCount silently to five and watch their mouth, hands and feet for a reply.
- Follow the endingWhen your baby looks away or fusses, let them rest, then follow them into the next thing.
Why turns matter more than word counts
For years, parents were told to pour as many words as possible over their babies. Newer research points somewhere more interesting. In a 2018 brain-imaging study at MIT and Harvard, 36 children aged 4 to 6 had their home talk recorded. More conversational turns went with more activity in Broca's area, a key language region, and with better verbal scores. The raw number of adult words did not show the same link, regardless of family income. It was small and a snapshot, so it shows a link, not cause.
A Colorado study recorded children's days from 2 to 36 months and tested 146 of them again at 9 to 14. Conversational turns at 18 to 24 months were linked to verbal and IQ scores about ten years later. It was correlational, and three authors worked for the company that makes the recorders. Still, the habits you build in the first year carry into that window.
And a trial shows how you talk can change things. At the University of Washington, parents coached in parentese had children producing about 100 words at 18 months, against about 60 in families who weren't coached. Read more on parentese and baby talk.
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The five steps
Harvard's guide boils the skill down to five steps:
- Notice the serve and share your baby's focus. A look, a point, a sound, a kick.
- Return the serve. Smile, nod, comfort, pick up the thing they're looking at.
- Give it a name. "That's the cat!" "You're hungry." "Those are your toes."
- Take turns, and wait. Give your baby time to respond.
- Notice endings and beginnings. When your baby looks away, drops the toy or fusses, they're done. Let them lead into the next thing.
Step 4 is where adults fall down. Young babies are slow; they're processing your face, your voice and their own body at once. So after you speak, count silently to five. Often the answer arrives at about four: a coo, a kick, a wide-mouthed "oh." And when your baby turns away, give them a break (see signs of overstimulation).
Ten serve-and-return games by age
| Game | Age | How it goes |
|---|---|---|
| Face to face | 0–3 months | Make one slow, wide-eyed "oh," hold it, wait, smile when they react |
| The copycat | 2–6 months | Copy their face or sound back, a little bigger |
| Coo conversation | 2–6 months | Answer each coo, count to five, aim for three rounds |
| Narrated diaper change | 0–12 months | "Legs up! Wipe, wipe. Cold!" Pause after each line |
| Raspberry ping-pong | 4–8 months | Blow a gentle raspberry, wait, cheer any mouth sound back |
| What are you looking at? | 4–9 months | Sit beside them, look where they look, name it |
| Babble to word | 6–10 months | "Ba-ba-ba" gets "Ball! Here's your ball" |
| Peekaboo with a pause | 6–12 months | Hide, wait, pop out at different moments |
| Song with a gap | 6–12 months | Stop before a key word in "Pat-a-cake," wait for a squeal |
| Point, name, bring | 9–12 months | Look where they point, name it, bring it closer |
Each game takes one to five minutes. Play in moments you already have: diaper changes, feeds, bath time, the grocery line.
Small details that make a big difference
- Answer babble fast. In a study of 30 babies about 8 months old, babbles that got a quick smile or touch became more mature and word-like. Answer while the sound is still in the air.
- Every point is a serve. Across 25 studies and 734 children, babies who pointed more tended to have stronger language. Look where they point and name it.
- Talk as if they understand. Babies aged 6 to 9 months looked at the right picture when a parent named common foods and body parts.
- Give your phone a home during feeds, baths and floor play. In a lab study, 2-year-olds learned a new word only when the teaching wasn't interrupted by a phone call. More on phones around babies.
The still-face experiment, and why missed serves are okay
In the 1970s, psychologist Edward Tronick filmed mothers playing face-to-face with their babies, then going still on a signal: same face, no response, for a few minutes. The babies smiled harder, cooed and reached. When nothing came back, they grew wary and upset. When the mother came back to life, they settled back into the game.
Now the gentle part. That was a deliberate, sustained blank face. Being tired, glancing away or missing a cue at 3 a.m. is different. Every parent misses serves all day, and babies are built for that. What helps is coming back: catch their eye, smile, "There you are." On a tired day, pick one feed, put the phone away and answer every sound your baby makes. That alone is dozens of turns.
Do this
- Count to five after you speak to your baby, before you add more words.
- Use a warm, sing-song parentese voice for at least one routine a day.
- Pick two games from the table and play them this week.
- Choose one phone-free zone, such as feeds or bath time, and keep it for seven days.
Grow a Genius
In the book: Chapter 16: Serve and Return
Chapter 16 explains each step with the research behind it and gives ten games by age, and the Talk to Me guide adds 101 conversation games from birth to age 6.
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People also ask
When should I start serve and return?
From birth. Newborns study faces up close, so hold your baby where your face fills their view, make a slow expression and wait for a reaction. Narrating diaper changes works from day one. As your baby starts cooing, babbling and pointing, you'll have more serves to answer.
What's an example of serve and return?
Your 3-month-old coos while looking at you. You say, in a warm sing-song voice, "Ooh, is that right? Tell me more!" Then you go quiet and count to five. They coo again, and you answer again. Three rounds in a row is a full conversation.
Is serve and return the same as talking to my baby a lot?
Not quite. Research from MIT and Harvard found back-and-forth turns were linked to language more strongly than the sheer number of words a child heard. Talking a lot helps most when you also pause, let your baby take a turn and answer what they do.
What if my baby doesn't respond?
Young babies are slow to answer, so wait longer, about five seconds. If your baby looks away, they may need a break. Ask at well visits whether hearing is on track, and raise it right away if your baby doesn't startle at loud sounds or react to your voice. Call your doctor now if they stop babbling.