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Week 2: Building Blocks of Communication: Speech, Language, Play, and Cognitive Development from Birth to 10 Years
- synapsekidsslp7
- Feb 9
- 15 min read
A neuroscience-informed, developmentally grounded guide to how communication is built from cognition, play, and social connection (Birth–10 Years)
By: Dr. Gayatri Ram, Ph.D., CCC-SLP
How to Use This Guide
This is a long-form, reference-style article by design.
Rather than a post meant to be read in one sitting, this guide is intended to function as a foundational resource you can return to over time. Different readers will use it differently:
Parents may focus on the age range that matches their child, the milestone tables, and the parent summary at the end.
Educators and early childhood professionals may use the developmental sequences and play and communication overlays to inform observation and classroom support.
Students and clinicians may use this as an integrative reference connecting cognition, play, prelinguistic skills, gestures, and language structure.
You do not need to read every section at once. Many families and professionals may revisit specific parts as a child grows or as new questions arise.
This guide is intentionally comprehensive because communication development is cumulative each layer builds on the ones before it.
Introduction: Communication Is Built, Layer by Layer
In many conversations about child development, speech is treated as the milestone that matters most. First words. Vocabulary counts. Sentence length. But speech is only the visible tip of a much larger developmental structure.
Language does not begin with words. It begins with attention, intention, memory, prediction, and shared experience. Long before a child says “mama”, their brain is learning how people interact, how actions cause reactions, and how meaning is shared.
This blog is written as a deep, integrative guide, the kind you return to when something doesn’t quite make sense developmentally. It is designed to support parents, educators, and post‑baccalaureate learners in understanding how communication is built, layer by layer, across childhood. This is how I would try explaining the complex development of communication skills from a perspective of interplay between play, cognition and linguistic skills. Please note the development milestones outlined here may look different for Gestalt language processors (that's a different blog topic in itself)
Communication, Language, and Speech: Foundational Distinctions
Before we discuss milestones, we must clarify terminology.
Communication is the broadest system. It is the act of sharing meaning through eye gaze, gesture, facial expression, vocalization, words, signs, or AAC.
Language is a symbolic, rule‑based system that allows meaning to be encoded and decoded. Language includes:
Receptive language (understanding words and messages)
Expressive language (using words, gestures, and sentences)
Speech is the motor act of producing sounds using the respiratory, phonatory, and articulatory systems.
A child can communicate without speech, and speech without language carries no meaning. These areas develop together and are shaped by how children think, play, and engage with others.
Developmental concerns arise when communication intent, symbolic understanding, or social reciprocity are disrupted, not simply when words are late.
*Please review week 1 blog for details on distinctions between speech and language.
The Developmental Triad: Cognition, Play, and Communication
Language is built on cognition, the ability to think, problem-solve, remember, and represent ideas. These cognitive skills develop through active interaction with people and objects, most clearly seen in play. Communication development rests on three tightly interwoven systems:
Cognition: how the child understands, predicts, and represents the world
Play:how the child explores, practices, and symbolically re‑creates experiences
Communication: how the child shares meaning with others
Example: An infant repeatedly drops a spoon from the high chair.
Cognition: developing Cause-effect (“When I release, it falls.”)
Play: repetition for mastery
Communication: eye contact, vocalization, anticipation of caregiver response
This is not misbehavior, it is the brain learning how interaction works.
Play is where these skills first emerge. Language is how they are later expressed.
These systems mature together. When one advances, it reorganizes the others.
Why Play Matters
Play is the primary way children explore the world, learn relationships, and practice communication. From infancy through childhood, play provides the context in which language and thinking develop together.
Speech-language pathologists observe play because it reveals how a child understands cause and effect, uses symbols, takes turns, and shares meaning often before these skills are expressed through words.
Play changes as children grow, and each stage of play supports new levels of language
Expanded Stages of Play: From Exploration to Narrative Worlds
Play continues to evolve well beyond toddlerhood and remains one of the clearest windows into cognitive and language development. As children grow, play becomes less about objects and more about ideas, relationships, and story structure.
Below is an expanded developmental continuum that aligns with your handout and supports the later language sections.
Play Development Continuum
Stage of Play | Approx. Age | Cognitive Focus | Language Skills Supported |
Exploratory / Sensorimotor | Birth–12 mo | Cause–effect, object permanence | Turn-taking, vocal play |
Functional Play | 9–18 mo | Means–end, categorization | First words, labels |
Single-Step Pretend | 18–24 mo | Symbolic representation | Two-word combinations |
Multi-Step Pretend | 2–3 yrs | Sequencing, planning | Early grammar, connectors |
Role Play | 3–4 yrs | Perspective-taking | Pronouns, dialogue |
Cooperative Pretend | 4–5 yrs | Executive function | Narrative language |
Rule-Based & Narrative Play | 5–7+ yrs | Metacognition | Story structure, explanations |
This progression mirrors the child’s ability to hold ideas in mind, sequence events, and share meaning with others, the same abilities required for advanced language.
Prelinguistic Communication: The First Year in Detail (0–12 Months)
Language development in the first year is foundational. During this time, infants move from reflexive behaviors to intentional, socially directed communication.
Core Prelinguistic Skills (Definitions + Examples)
Before babies speak their first words, they are learning to communicate in many ways. Every smile, gesture, and sound helps them develop language. Researchers like Michael Halliday describe the “why” behind communication, what children are trying to do when they interact.
Here’s a clear guide mapping 11 key prelinguistic skills to their communication purpose and real-life examples:
Prelinguistic Skill | Communication Purpose (Halliday Function) | What the Child is Doing / Communicating | Why It Matters for Language | Parent-Friendly Example |
Eye contact | Interactional (connecting with others) | Shows the child is aware of and interested in you | Builds attention, turn-taking, and early conversation skills | Baby looks at you when you talk, signaling readiness to interact |
Shared affect (smiles, facial expressions) | Interactional / Social | Shares feelings and responds emotionally | Encourages social connection and reciprocity | Smiling back when you smile, laughing during peek-a-boo |
Joint attention | Representational / Informative (sharing info) | Focuses on the same object or event as another person | Foundation for word learning and understanding reference | Pointing at a dog and looking at you to show “dog” |
Turn-taking | Regulatory / Conversational | Learns back-and-forth structure of communication | Establishes conversation rhythm and dialogue skills | Babbling, then pausing for you to respond, like a mini-conversation |
Gestures | Instrumental / Representational | Uses movements to communicate meaning | Supports symbolic intent and first words | Waving hello, pointing to a toy, showing they want something |
Imitation | Learning / Social | Copies sounds, actions, and gestures | Reinforces speech sound learning, gestures, and social interaction | Repeating your “ba-ba” or clapping when you clap |
Vocal play | Expressive (playing with sounds) | Experiments with sounds, pitch, and rhythm | Develops speech sound control, prepares for words | Babbling with different pitches: “ba-ba,” “da-da,” “ma-ma” |
Babbling | Phonological / Representational | Practices sound combinations like words | Lays groundwork for first words and speech patterns | “Ba-ba” or “da-da” before saying “mama” |
Cause–effect play | Instrumental / Problem-solving | Learns that actions can produce outcomes | Supports intentional communication, requesting, and planning | Pressing a button to make a toy light up or sound |
Object permanence | Representational / Informative (heuristic) | Understands that objects exist even when hidden | Enables reference to absent objects/people, symbolic language | Looking for a hidden toy or talking about a parent who left the room |
Means–end reasoning | Instrumental / Goal-directed | Plans actions to reach a goal | Supports requests, problem-solving, and intentional communication | Pulling a chair to reach a toy or giving a cup to an adult to be filled |
Early Vocal Development: Research‑Based Definitions
Reflexive vocalizations (0–2 months): Early sounds including crying, fussing, and vegetative noises. These are not intentional but provide caregivers with cues.
Cooing (2–4 months): Comfort‑state vocalizations characterized by vowel‑like sounds (e.g., /oo/, /ah/). Cooing reflects early control over phonation and is strongly linked to social engagement.
Vocal play (4–6 months): Intentional experimentation with pitch, loudness, and duration (growls, squeals). This stage shows increasing motor control and auditory feedback loops.
Reduplicated babbling (6–9 months): Repeated consonant‑vowel sequences with identical syllables (e.g., bababa, mamama). Babbling reflects emerging timing and coordination between articulators.
Variegated babbling (9–12 months):Babbling with changing consonants and vowels (e.g., baduga). This stage more closely resembles adult speech prosody.
Jargon (10–14 months): Long strings of babble with adult‑like intonation patterns, pauses, and stress often accompanied by gestures. Jargon signals that the child understands conversational structure before words emerge.
First words (~12 months): A sound sequence used consistently, meaningfully, and intentionally to refer to an object, person, or action (e.g., mama to call mom)
Gestures: From Prelocutionary to Locutionary Communication
Gestures evolve alongside cognition and social understanding, moving from reflexive behaviors to intentional symbolic acts.
16 Early Communicative Gestures (Functional Matrix)
Gesture | Function | Example |
Reach | Request | Arms up to be picked up |
Give | Share | Hands toy to adult |
Show | Share attention | Holds up object |
Point (request) | Instrumental | Points to cookie |
Point (share) | Declarative | Points to dog |
Wave | Social | Waves bye |
Nod | Affirm | Nods yes |
Shake head | Negation | Shakes no |
Clap | Social reward | Claps after success |
Push away | Reject | Pushes spoon |
Pull adult | Assistance | Pulls hand to door |
Raise arms | Request | Wants to be picked up |
Shrug | Uncertainty | Shrugs shoulders |
Facial affect | Emotional | Smiles/frowns |
Imitative gesture | Learning | Copies brushing motion |
Conventional sign | Symbolic | Signs “more” |
Gestures reveal why a child is communicating, not just how.
Levels of Intent in Gesture Development
Level | Definition | Example |
Prelocutionary | Behaviors without clear intent that still affect others | Crying causes caregiver response |
Illocutionary | Intentional acts without conventional symbols | Reaching to request help |
Locutionary | Symbolic, intentional communication | Pointing to share interest |
Protoimperative vs Protodeclarative Gestures
Gesture Type | Purpose | Cognitive Skill | Example |
Protoimperative | To request or obtain | Means–end reasoning | Pointing to a snack |
Protodeclarative | To share attention | Theory of mind | Pointing to an airplane |
Children who primarily use protoimperative gestures but rarely protodeclarative gestures may show vulnerabilities in joint attention because these gestures require awareness of another person’s mental state and are critical for later language development.
Early Play and Language Integration
0–1 Year (Infancy)
Types of Play
Sensorimotor play: Mouthing, shaking, banging objects
Exploratory play: Touching, grasping, watching objects
Social play: Smiling, cooing, peek-a-boo
Language Integration
Early vocalizations: cooing, babbling, first words
Turn-taking: Responding to caregiver sounds
Joint attention: Focusing on an object together, foundational for word learning
Gestures (pointing, reaching) accompany emerging verbalizations
1–2 Years: Words Become Symbols
This period marks the transition from intentional communication to symbolic language, where children begin to encode meaning using words that stand in for people, objects, and actions. It is a period of rapid vocabulary growth.
Early Word Types Acquired
Word Type | Examples | Function |
Nouns | mama, ball, dog | Labeling objects/people |
Social words | hi, bye | Interactional |
Action words | go, eat | Describing actions |
Modifiers | more, allgone | Quantity/state |
Early Word Combinations
Children do not combine words randomly. Early combinations reflect underlying cognitive relations.
Combination Type | Example | Cognitive Basis |
Agent + Action | Mommy go | Understanding roles |
Action + Object | Eat cookie | Cause–effect |
Possessor + Object | My ball | Ownership |
Attribute + Object | Big truck | Categorization |
Brown’s 14 Morphemes (Early Grammatical Development)
Roger Brown identified 14 grammatical morphemes that typically emerge in a predictable order as children’s syntactic, semantic, and working memory systems mature. These morphemes reflect increasing linguistic precision rather than simple vocabulary growth.
Order | Morpheme | Example | Function |
1 | Present progressive -ing | running | Ongoing action |
2 | Prepositions in / on | in box | Spatial relations |
3 | Plural -s | dogs | Quantity |
4 | Irregular past | went | Time reference |
5 | Possessive ’s | mommy’s | Ownership |
6 | Uncontractible copula | is | State of being |
7 | Articles a / the | a ball | Specificity |
8 | Regular past -ed | jumped | Completed action |
9 | Regular 3rd person -s | runs | Agreement |
10 | Irregular 3rd person | has | Agreement |
11 | Uncontractible auxiliary | are | Verb support |
12 | Contractible copula | it’s | Efficiency |
13 | Contractible auxiliary | he’s | Efficiency |
14 | Uncontractible auxiliary (emphasis) | was | Temporal contrast |
This period marks the shift from prelinguistic to symbolic communication.
Play Skills : 1–2 Years (Toddlerhood)
Types of Play
Functional play: Using objects as intended (feeding a doll, stacking blocks)
Simple pretend play: Pretending to drink from a cup, talking on a toy phone
Parallel play: Playing alongside peers but not yet fully interacting
Language Integration
Explosion of vocabulary (~50–200 words by age 2)
Early two-word combinations (“more juice,” “go car”)
Gestures + words: Supports comprehension and expression
Pretend play encourages use of symbolic language (words represent objects/actions)
Ages 3–5 Years: Language for Meaning, Relationships, and Stories
At this stage, language shifts from naming and combining words to organizing ideas, sharing experiences, and navigating social relationships.
This is a critical developmental window where vocabulary depth, sentence complexity, and narrative foundations rapidly expand.
What Is Developing Linguistically (3–5 Years)?
1. Vocabulary Depth (Not Just Vocabulary Size)
Children are no longer just learning new words, they are learning multiple meanings, categories, and relationships between words.
Key developments include:
Expansion of descriptive vocabulary (adjectives: big/small, fast/slow, feelings)
Growth in relational words (prepositions: in, on, under, behind)
Increased use of mental state words (think, know, remember, feel)
This depth allows children to:
Be more precise
Explain preferences
Describe events beyond the here-and-now
2. Grammatical Development
Between 3–5 years, children refine grammar rather than merely acquiring it.
Common developments:
Consistent use of pronouns (he, she, they, his, her)
Emergence of different sentence types:
Questions (“Why did he go?”)
Negatives (“I don’t want that”)
Early complex sentences (“I like it because…”)
Errors are expected and informative, they reflect rule learning, not regression.
3. Narrative Development: Early Stages
Narrative skills begin long before children can tell a “full story.”
Stages of Narrative Development (Early)
Descriptive Sequences
Labeling characters or actions
“Dog. Running. Park.”
Action Sequences
Linked actions without causal structure
“He run. He fall. He cry.”
Reactive Sequences (emerging by ~4–5 years)
Events connected by cause–effect
“He fell because the floor was wet.”
Phase 3: Semantic Relationships in preschool years
Play–Language Integration (3–5 Years)
During this period, play becomes:
Role-based (doctor, parent, teacher)
Socially negotiated (“You be the baby”)
Narrative-driven
Language supports play by:
Assigning roles
Negotiating rules
Explaining actions and motivations
Play, in turn, drives narrative language growth.
Ages 5–7 Years: Language for Learning, Narratives, and Thinking About Language
At this stage, language becomes a tool for academic learning, social reasoning, and self-reflection.
This is a reorganization phase, not just continued growth.
What Is Developing Linguistically (5–7 Years)?
1. Advanced Sentence Structure
Children begin using:
Complex sentences with conjunctions(because, although, while)
Embedded clauses(“The boy who was running fell.”)
More precise verb tense and agreement
These structures allow children to:
Explain reasoning
Compare ideas
Justify opinions
2. Narrative Development: Mature Story Grammar
By this age, children move toward true narratives with recognizable structure.
Stages of Narrative Development (Later)
Abbreviated Episodes
Problem + action, limited resolution
Complete Episodes
Character
Problem
Attempt
Outcome
Complex Narratives (emerging)
Internal states (feelings, thoughts)
Multiple attempts
Logical sequencing
Narrative competence is a strong predictor of later reading comprehension and academic success.
3. Metalinguistic Skills
Children begin to think about language itself.
Examples include:
Understanding jokes and riddles
Playing with words
Noticing ambiguity
Beginning figurative language (idioms, non-literal meanings)
These skills require:
Cognitive flexibility
Strong vocabulary networks
Executive functioning
Phase 4: Development of Narrative Skills and Metacognition in School-age years
Play–Language Integration (5–7 Years)
Play often shifts to:
Rule-based games
Story-driven imaginary worlds
Collaborative planning
Language is used to:
Explain rules
Resolve conflicts
Maintain shared narratives
A child who struggles here may appear verbally fluent but still have language-based learning vulnerabilities.
7–10 Years: Metalinguistic and Abstract Language
1. Linguistic Development
At 7 years and beyond, children’s language skills become increasingly complex and nuanced. Here’s a detailed breakdown:
a. Syntax (Sentence Structure)
Children move from simple and compound sentences to complex and compound-complex sentences.
Example: “I went to the park, and I saw my friend, who was playing with a puppy.”
Use of subordinate clauses and conjunctions becomes more sophisticated (“although,” “because,” “since,” “unless”).
Sentences are longer and more precise, showing improved grammatical accuracy.
b. Semantics (Meaning and Vocabulary)
Rapid expansion of vocabulary, including:
Academic words (school-related concepts)
Abstract terms (justice, honesty, emotions)
Technical terms related to hobbies or interests
Use of polysemy (words with multiple meanings) and homonyms becomes more accurate.
Children can understand and produce figurative language, including:
Metaphors (“Time is money”)
Similes (“as brave as a lion”)
Idioms (“spill the beans”)
Irony and sarcasm emerge, particularly in social contexts.
Meta-linguistic Awareness
Children begin to reflect on language itself:
Identifying errors in their own speech or others’
Understanding puns and wordplay
Playing with language creatively (jokes, rhymes, riddles)
This skill is critical for reading comprehension, writing, and social communication.
Narrative Skills
Narrative abilities improve in structure and complexity:
Chronological sequencing: Events are told in logical order
Causal links: Explaining why events happened
Character perspectives: Understanding thoughts and feelings of multiple characters
Narratives include descriptive details, dialogue, and complex storylines
Typical assessment: children can retell a story with a clear beginning, middle, and end, including problem-solving or moral reasoning.
Play Development
At 7 years and beyond, play evolves from purely imaginative and parallel play into more
structured, cooperative, and rule-based play:
a. Types of Play
Rule-based games: Board games, sports, card games with structured rules
Collaborative and cooperative play: Group problem-solving, team-based activities
Creative and pretend play continues, but more realistic scenarios emerge
Digital and constructive play: Building with LEGO, coding, video game narratives
b. Integration with Language
Play is highly language-mediated:
Children use language to negotiate rules, explain strategies, and resolve conflicts.
Storytelling occurs in role-play (e.g., acting as a teacher, doctor, or hero)
Use of figurative language and humor often emerges during pretend play.
Play supports executive functions: planning, turn-taking, inhibition, problem-solving.
Social-cognitive skills: Understanding perspectives, empathy, and humor are enhanced through play and language integration.
Why Milestones Matter
Milestones provide context, not diagnosis. Persistent gaps across communication, cognition, and play, especially in prelinguistic skills signal the need for support.
When to Refer
Referral is recommended when:
Limited gestures or joint attention by 12 months
Few words by 18 months
No word combinations by 24 months
Communication frustration or REGRESSION occurs
Early intervention strengthens foundations, it does not constrain potential.
A Parent-Centered Summary: What This Means for You
If you are a parent reading this, it’s normal to wonder: “What am I actually supposed to look for?” or “Why does my child’s therapist keep asking me to play?” This section connects the science to your everyday experience.
What You Can Watch for at Home
Rather than focusing only on words, pay attention to how your child is communicating:
Do they look to you to share excitement or frustration?
Do they try to get your attention using sounds, gestures, or actions?
Do they imitate what you do during play or daily routines?
Do they show curiosity about objects and people?
These behaviors tell us whether the foundation for language is strong.
A child who is not talking yet but uses gestures, seeks interaction, and plays purposefully is developing differently from a child who rarely initiates or responds.
What an SLP Is Observing When They Ask You to “Play”
When a speech‑language pathologist asks you to play with your child, they are not testing toys or parenting style. They are looking for key building blocks of communication.
During play, an SLP is observing:
Attention: Can your child stay engaged with you or an activity?
Intent: Does your child try to communicate a need, want, or idea?
Reciprocity: Does your child respond when you act or speak?
Symbolic understanding: Can your child pretend, imitate, or represent ideas?
Problem‑solving: Does your child use strategies to achieve goals?
Play reveals how your child thinks, learns, and connects far more accurately than drills or flashcards.
Why Play Is the Language Learning Environment
Children learn language best when:
They are emotionally regulated
The interaction is meaningful
The activity is motivating
Play naturally supports all three.
For example:
Rolling a ball back and forth builds turn‑taking
Pretending to feed a doll builds symbolic language
A pause during play invites initiation and problem‑solving
This is why therapy and effective home support often looks like play. It is not "just play." It is targeted, brain‑based interaction.
What to Ask Your Child’s SLP
If you’re unsure what your child needs, helpful questions include:
Which building blocks are strong right now?
Which ones are still developing?
How can I support these skills during everyday routines?
A good therapy plan focuses on strengthening foundations, not forcing words before a child is ready.
A Reassuring Note for Parents
Children do not all follow the same timeline but they do follow the same developmental sequence.
If something feels off, asking questions early is not overreacting. It is advocacy.
Support does not change who your child is, it helps them access connection, learning, and joy.
Final Takeaway
Communication is not a milestone children hit, it is a structure they build.
When we understand the building blocks, we shift from asking “Why isn’t this child talking yet?” to “Which layer needs support right now?”
This perspective allows parents and professionals to move beyond comparison and toward developmentally informed, compassionate support.
Next: A curated milestone resource library with free printable handouts and optional in-depth developmental guides. Click the button below to be directed to the Parents Resource Library
References
The following foundational texts and peer-reviewed sources informed the developmental frameworks, milestone sequences, and theoretical models discussed in this guide:
Bates, E., Camaioni, L., & Volterra, V. (1975). The acquisition of performatives prior to speech. Merrill-Palmer Quarterly, 21(3), 205–226.
Brown, R. (1973). A first language: The early stages. Harvard University Press.
Bruner, J. S. (1983). Child’s talk: Learning to use language. Oxford University Press.
Halliday, M. A. K. (1975). Learning how to mean: Explorations in the development of language. Edward Arnold.
Iverson, J. M., & Goldin-Meadow, S. (2005). Gesture paves the way for language development. Psychological Science, 16(5), 367–371.
McCune, L. (2008). How children learn to learn language. Oxford University Press.
Paul, R., & Norbury, C. F. (2012). Language disorders from infancy through adolescence (4th ed.). Elsevier.
Piaget, J. (1952). The origins of intelligence in children. International Universities Press.
Tomasello, M. (2003). Constructing a language: A usage-based theory of language acquisition. Harvard University Press.
Westby, C. (2005). Assessing and facilitating text comprehension problems. In H. Catts & A. Kamhi (Eds.), Language and reading disabilities (2nd ed., pp. 157–232). Pearson.