Speech Milestones by Age: When to Call the Pediatrician (0–6 Years)

Few moments are as moving as hearing your child’s first word. Maybe it was “mamá,” “agua,” or the name of the family dog. From then on, many parents start listening closely, comparing notes with friends, and sometimes wondering: Is my child talking enough? Should they be saying more by now?

If you have asked yourself these questions, you are not alone, and you are doing exactly what a caring parent does. This article walks you through typical speech and language milestones from birth to six years, shares simple ways to support your child’s communication through play, and explains when it makes sense to call your pediatrician. Our goal is to help you feel informed and confident, not worried.

First, a Gentle Reminder: Every Child Has Their Own Timeline

Children develop at different rates. Some say their first words at 10 months, others closer to 15 months, and both can be perfectly healthy. Some children are “watchers” who understand a lot before they talk much, then seem to start speaking in full phrases overnight. Others chatter early but take longer with walking or fine motor skills.

The milestones below come from the “Learn the Signs. Act Early.” checklists from the U.S. Centers for Disease Control and Prevention (CDC), updated in 2022 together with the American Academy of Pediatrics (AAP). These checklists describe skills that most children (about 75%) show by a given age. That means they are not a race or a test. They are a helpful guide for knowing when a conversation with your pediatrician might be useful.

Above all, remember: you are the expert on your own child. You know how they communicate, what makes them laugh, and how they ask for what they need, even without words. Your observations are valuable information for any professional.

What to Expect: Speech and Language Milestones by Age

Communication is much more than words. It includes listening, understanding, gestures, eye contact, facial expressions, and taking turns. Here is what you might see at each stage of early childhood development.

Birth to 12 Months: The Foundations

• By 2 months: makes cooing sounds and reacts to loud noises; calms or smiles when you talk.
• By 4 months: coos back when you talk to them and turns toward your voice.
• By 6 months: takes turns making sounds with you, blows “raspberries,” and squeals with delight.
• By 9 months: babbles strings of sounds like “mamama” or “bababa,” looks when you call their name, and lifts arms to be picked up.
• By 12 months: waves “bye-bye,” calls a parent “mama,” “dada,” or a special name, and understands “no.”

You might notice your baby “chatting” back during diaper changes, pausing as if waiting for your reply. That back-and-forth is the very beginning of conversation.

12 to 24 Months: First Words and Big Discoveries

• By 15 months: tries to say one or two words besides “mama” or “dada,” points to ask for something, and follows simple directions with a gesture (like “give me the ball”).
• By 18 months: tries to say three or more words and follows one-step directions without gestures.
• By 2 years: says at least two words together, such as “more milk” or “daddy go,” points to things in a book when asked, and uses gestures like nodding “yes.”

At this age, many children use one word to mean many things. “Ball” might mean the ball, the moon, and an orange. This is a smart strategy, not a mistake!

2 to 3 Years: The Language Explosion

• By 30 months: says about 50 words, combines two or more words with an action word (“doggie run”), and names things in a book.
• By 3 years: has back-and-forth conversations with at least two exchanges, asks “who,” “what,” “where,” or “why” questions, and says their first name when asked.

Many parents notice that, suddenly, their toddler is repeating everything, including words you may wish they hadn’t heard!

3 to 4 Years: Storytellers in Training

• Says sentences with four or more words.
• Repeats words from songs, stories, or nursery rhymes.
• Talks about at least one thing that happened during the day, like “I played with blocks.”
• Answers simple questions like “What is a coat for?”
• Is understood by unfamiliar listeners most of the time, even if some sounds are still developing.

4 to 6 Years: Confident Communicators

• By 5 years: tells a story with at least two events, answers simple questions about a book after hearing it, keeps a conversation going with more than three exchanges, and uses or recognizes simple rhymes.
• 5 to 6 years: uses longer, more complex sentences, explains ideas, plays with words and jokes, and is becoming ready for early literacy.

Keep in mind that some sounds, like “r,” “s,” or “th,” often take until age 6 or 7 to master. A five-year-old who says “wabbit” for “rabbit” is usually still within the typical range.

A Note for Bilingual and Multicultural Families

At Runningbrook, we have welcomed families from more than 35 countries, and many of our children grow up hearing two or more languages. Parents often ask whether bilingual education causes speech delays. The research is reassuring: according to the American Speech-Language-Hearing Association (ASHA) and decades of studies by researchers such as Fred Genesee and Erika Hoff, learning two languages does not cause language delays or disorders.

Here is what is helpful to know:

• Bilingual children reach major milestones, like first words and two-word phrases, within the same general age ranges as monolingual children.
• Their vocabulary may be split between languages, so count words in all languages together.
• Mixing languages in one sentence (“I want más agua”) is a normal, clever part of bilingual development.
• Some children go through a “silent period” when exposed to a new language, listening a lot before speaking it.

Culture also shapes communication. In some families, children are encouraged to talk with adults freely; in others, listening respectfully is highly valued. Both are valid. When you speak with your pediatrician, share how your family communicates at home so they can see the full picture.

When to Call the Pediatrician

Talking to your pediatrician does not mean something is “wrong.” It simply means you are gathering information. In Chile, your child’s regular control del niño sano is a great time to bring up questions, but you don’t need to wait for a scheduled visit if something worries you.

Consider reaching out if you notice:

• Any loss of skills at any age, such as words or babbling your child used to say and no longer does. This is always worth checking promptly.
• By 9–12 months: little or no babbling, not responding to their name, or not using gestures like pointing or waving.
• By 18 months: not saying at least a few words or not understanding simple familiar words.
• By 2 years: not combining two words, or only imitating words without using them on their own.
• By 3 years: speech that is very hard for family members to understand, or not using short sentences.
• By 4 years: speech that unfamiliar people rarely understand, or difficulty following simple directions.
• At any age: concerns about hearing (frequent ear infections, not reacting to sounds), very limited eye contact or interest in interaction, or persistent stuttering that causes frustration.

Your pediatrician may suggest a hearing test or a referral to a speech-language therapist (in Chile, a fonoaudiólogo/a). Early support is gentle, often play-based, and can make a big difference. And sometimes, the answer is simply: “Your child is doing well, let’s keep watching.” That reassurance has value too.

Trust your instincts. If something feels off to you, it is always okay to ask.

What You Can Do: Play-Based Ways to Support Speech at Home

The best language lessons don’t look like lessons at all. They happen during bath time, meals, car rides, and play. Here are five practical strategies you can start today:

• 1. Narrate your day. Describe what you and your child are doing: “I’m cutting the apple. Crunch! Now it’s your turn.” This “self-talk” surrounds children with rich, meaningful language.
• 2. Follow their lead. Notice what interests your child and talk about it. If they are fascinated by a bird outside, pause and say, “A bird! It’s flying up, up, up!” Children learn best when language connects to what they already care about.
• 3. Pause and wait. After you ask a question or start a song, wait a few seconds. That silence gives your child space to respond with a sound, gesture, or word.
• 4. Expand, don’t correct. If your child says “Car go,” respond with “Yes, the red car is going fast!” You model the next step without making them feel they made a mistake.
• 5. Read, sing, and rhyme every day. Books, songs, and finger rhymes in any of your family’s languages build vocabulary, listening skills, and a love of words. Speak to your child in the language you feel most natural and expressive in.

Screens can’t replace these warm, back-and-forth moments. Research consistently shows that live, responsive interaction, what Harvard’s Center on the Developing Child calls “serve and return,” is what builds strong brain connections for language.

How Runningbrook Supports Communication Through Play

Our child-centered approach and play-based learning are designed with communication at their heart. Small group sizes mean our dedicated educators can truly listen to each child, respond to their ideas, and gently extend their language.

• Growing Steps (6m–2y): educators respond to coos, babbles, and gestures, sing songs, and name the world around babies during daily routines.
• Playgroup (2–3y): pretend play, picture books, and outdoor exploration spark new vocabulary and first conversations with friends.
• Kid’s Club (3–4y): circle time, storytelling, and group games help children share ideas, ask questions, and take turns.
• Pre-Kinder (4–6y): children tell stories, play with rhymes and sounds, and build the oral language foundations for reading and writing.

Our bilingual education and multicultural environment celebrate every family’s languages. We also partner closely with parents, sharing observations and supporting families if they decide to seek extra guidance from a pediatrician or specialist.

Conclusion: Your Voice Matters Most

Speech development is a journey with many paths. Some children sprint, some stroll, and some take a scenic detour before arriving at the same destination. Milestones are helpful signposts, but they are not the whole story of who your child is.

The most powerful tool for your child’s language growth is something you already have: your voice, your attention, and your love. Every song you sing, every story you tell, and every moment you wait patiently for their reply is building their confidence as a communicator.

And if you ever have a question or a doubt, reach out to your pediatrician, and to us. You know your child best, and you never have to navigate this journey alone.