Development by Age Stage
General guidance from birth through early adolescence. Age ranges are approximate — development varies between children.
General Information
Age ranges on this page are approximate and descriptive, not diagnostic. Children develop at different rates. If you have concerns about your child's development, behaviour, health, or wellbeing, please contact a qualified professional.
Newborn
Birth to approximately 3 monthsThe newborn period is defined by rapid adjustment — for the baby and for the caregivers. A newborn is navigating an entirely new sensory environment while developing the most basic capacities for feeding, sleeping, and communicating. This stage is often physically and emotionally demanding for families.
Communication
Communication in the newborn period is pre-verbal — cries, facial expressions, body tension, and gaze are the primary channels. Babies are drawn to human voices and faces from birth. Talking to and making eye contact with a newborn during feeding and care is meaningful, not wasted. Caregivers begin to distinguish different types of cries over the first weeks.
Emotional Development
Newborns do not experience emotions in the way older children do, but they are sensitive to the emotional tone of the environment around them. A caregiver's calm voice and relaxed handling has a settling effect. The newborn period is a time of establishing basic felt safety.
Social Development
Social development at this stage is largely dyadic — between the baby and primary caregivers. The first social smile, which typically emerges between 6 and 8 weeks, is a significant development and a touchpoint for caregivers who have been uncertain whether the baby recognises them.
Learning & Thinking
Newborns prefer the sound of voices they have been exposed to in the womb, particularly their primary caregiver's voice. They are learning to associate particular sensory experiences with comfort or distress — the smell of a caregiver, the rhythm of a particular voice.
Physical Development
Newborns have limited but functional motor capacities — they can turn their head toward a sound, root for feeding, and reflexively grasp. Tummy time on a safe surface, even briefly, supports developing neck and shoulder strength.
Sleep & Routines
Newborns sleep in frequent, short cycles throughout the day and night. Total sleep over 24 hours may be 14–17 hours, distributed across many short stretches. Irregular sleep patterns are typical.
Complete dependence is typical and healthy at this stage. There is no developmental pressure toward independence in the newborn period.
Sleep deprivation is the most commonly reported challenge. Uncertainty about why the baby is crying, breastfeeding difficulties, and the significant adjustment to the caregiver identity are all common.
- Respond consistently to cries — this is how the baby begins to build trust.
- Manage your own rest however you can — sleep deprivation significantly affects caregiving.
- Accept help where it is genuinely offered.
- Follow safe sleep guidance from your health provider.
- Seek support if you are experiencing very low mood, disconnection, or anxiety — these are worth discussing with a doctor.
What Matters Most at This Stage
At this stage, the most important things are warmth, responsiveness, and safety. Newborns are not developmentally ready to be trained, taught, or scheduled — they need consistent care.
Baby
Approximately 3 to 12 monthsThe baby stage is marked by dramatic and rapid development — from a baby who can hold their head briefly to one who may be crawling, pulling to stand, and saying their first syllables. The pace of change in this period is unlike any other.
Communication
Babbling begins in this period — first simple repeated syllables ("ba-ba-ba"), then more varied combinations. By 9–12 months, many babies understand more than they can produce. They respond to their own name, begin to use gestures (pointing, reaching, waving), and use sounds to get attention.
Emotional Development
Separation anxiety, which often develops around 7–12 months, is a sign of healthy attachment — the baby now understands that people continue to exist when they leave, and objects to their departure. This is developmental progress, not regression.
Social Development
Babies become more actively social through this period — they initiate interaction, share enjoyment through looks and sounds, and engage in back-and-forth exchanges that have the form of conversation long before they have words. Social referencing — looking to a caregiver's face for information about whether something is safe — develops.
Learning & Thinking
Object permanence — understanding that objects continue to exist when out of sight — develops through this period. Exploration through mouthing, banging, and dropping is cognitive work. Cause and effect is practiced constantly.
Physical Development
The sequence from rolling to sitting to crawling to pulling to stand follows a broad pattern, though the specific form varies — some babies bottom-shuffle rather than crawl, for example. Most babies begin walking in the 9–15 month window, though some walk later without this indicating a problem.
Sleep & Routines
Nap patterns typically consolidate to two in this period. Night waking continues for many babies — this is typical. Total sleep over 24 hours is generally around 12–16 hours.
Finger feeding, cup drinking, and beginning to use a spoon are developmentally appropriate to introduce toward the latter part of this stage.
Teething, separation anxiety, the transition to solid foods, and sleep changes are among the most common challenges in this period.
- Continue to respond to distress warmly.
- Provide safe spaces for movement and exploration.
- Talk and sing constantly — this is the primary language input at this stage.
- Introduce books as objects of interest.
- Attend regular health check-ups.
What Matters Most at This Stage
The most important things at this stage are exploration, language input, and a warm, responsive caregiver relationship. There is no developmental benefit to rushing any milestone.
Toddler
Approximately 1 to 3 yearsThe toddler years are characterised by the tension between growing independence and ongoing dependence — a child who wants to do everything themselves and also needs a great deal of support. This stage involves some of the most rapid language and motor development of childhood.
Communication
Language expands from single words to two-word combinations to simple sentences during this period, though the timing varies significantly between children. Many toddlers have a vocabulary explosion at some point in the second or third year. Even toddlers with limited spoken language often understand much more than they can express.
Emotional Development
The famous "terrible twos" is better understood as the period when a child has strong opinions and desires but limited language to express them and limited brain capacity to regulate the resulting feelings. Tantrums are a normal part of this stage and reduce as language and self-regulation develop.
Social Development
Parallel play — playing beside other children rather than with them — is typical in the toddler years. Genuine cooperative play is still developing. Sharing is difficult at this stage and should not be expected in the same way it might be from an older child.
Learning & Thinking
Symbolic play develops — a block becomes a car; a pot becomes a drum. This is a cognitive milestone indicating the capacity for representation. Toddlers learn through repetition — hearing the same book read many times, wanting to do the same task repeatedly.
Physical Development
Walking becomes increasingly steady and then gives way to running, climbing, and beginning to jump. Fine motor skills develop to allow scribbling, then increasingly controlled mark-making.
Sleep & Routines
Most toddlers need 11–14 hours of sleep in total. Afternoon naps continue for many through this period, gradually becoming shorter. Settling at night can be a challenge.
The drive toward independence is very strong at this stage — "I do it!" is one of the most characteristic toddler statements. This should be supported where safe and practical.
Tantrums, selective eating, sleep resistance, and the management of strong opinions are among the most commonly reported challenges.
- Provide consistent structure with warmth.
- Build transition warnings into the day.
- Offer limited choices.
- Stay calm during tantrums.
- Narrate what's happening to build language.
What Matters Most at This Stage
The toddler years reward caregivers who can hold firm limits with genuine warmth. Consistency — not perfection — is what matters most.
Preschooler
Approximately 3 to 5 yearsThe preschool years see children move from the emotional volatility of the toddler period toward something more settled, without yet having the impulse control and perspective-taking of school-age children. Play becomes more collaborative; language becomes richer; relationships with other children become more intentional.
Communication
Language becomes increasingly fluent and complex through the preschool years. Children begin telling stories — their accounts of events become more sequential and coherent. Questions are constant and often philosophical. Many preschoolers go through a period of phonological "errors" that are typical and resolve without intervention.
Emotional Development
Emotional intensity can remain high in the preschool years, but many children develop slightly better capacity to be talked through difficult feelings. Fears — of the dark, of imaginary things, of specific situations — are common and normal in this period.
Social Development
Cooperative play develops significantly. Children begin to have preferred friends, though friendships at this stage remain fluid. The beginnings of the social dynamics that become more complex at school appear — inclusion, exclusion, hierarchy.
Learning & Thinking
Curiosity is the defining characteristic of this period. Children ask questions constantly about how things work, why things are as they are, and what happens when. This is cognitive exploration and is worth feeding rather than managing.
Physical Development
Running, jumping, climbing, and beginning to pedal become reliable. Fine motor skills allow drawing recognisable shapes and figures. Scissors can be used with adult supervision.
Sleep & Routines
Most preschoolers need 10–13 hours of sleep. Afternoon naps reduce and many children drop them entirely by 4–5 years. Bedtime resistance is common.
Dressing, toileting, and eating can be accomplished largely independently during this stage, though support and prompting remain normal.
Bedtime resistance, intense questioning, managing newly complex social situations, and navigating strong imaginative fears are common challenges.
- Engage with questions genuinely.
- Read aloud daily.
- Provide a range of creative and physical play opportunities.
- Begin gentle preparation for the school environment.
- Maintain predictable routines.
What Matters Most at This Stage
The preschool years are a time to feed curiosity, build independence, and establish the social and emotional foundations that school will require.
Early School Age
Approximately 5 to 7 yearsStarting school marks a significant expansion in a child's world — new demands, new relationships, and new ways of being evaluated. The early school years involve adjustment, and many children experience both the excitement and the difficulty of this transition.
Communication
Language continues to develop rapidly. Children begin to understand and use metaphor, inference, and more complex sentence structures. Reading and writing begin to develop as formal skills, though at very different rates between children.
Emotional Development
School introduces new sources of emotional pressure — performance expectations, peer comparison, the gaze of teachers. Many children experience increased emotional difficulty at the beginning of school terms. Learning to manage these new pressures takes time.
Social Development
Peer relationships become increasingly important and more complex. The desire for acceptance from peers grows. Gender groupings in play often become more defined in this period, though this is not universal.
Learning & Thinking
Formal literacy and numeracy develop, with significant individual variation in rate and ease. Children begin to develop learning habits — how they approach a task, how they manage not knowing something, whether they ask for help.
Physical Development
Physical coordination improves significantly. Most children can ride a bike, catch a ball with more reliability, and perform fine motor tasks like writing with increasing control.
Sleep & Routines
Most children in this age range need around 9–12 hours of sleep. School fatigue can build through the week.
Many children can manage their morning routine, school bags, and personal hygiene with minimal prompting by this stage — though they still benefit from reminders and support.
School refusal or reluctance, reading difficulties, friendship problems, and adjustment to the structured school day are common in this period.
- Stay curious about the school experience rather than focused only on outcomes.
- Make the home a safe place to decompress.
- Maintain bedtime routines.
- Build homework habits from the start, lightly.
- Communicate regularly with the school.
What Matters Most at This Stage
The most valuable thing at this stage is a home environment where school is talked about positively, effort is valued over results, and difficulty is treated as normal.
Middle Childhood
Approximately 8 to 10 yearsMiddle childhood tends to be a more settled period than the early school years. Children develop greater cognitive capacity, more stable friendships, and a clearer sense of their own strengths and interests. Family relationships remain important, though peer relationships are growing in significance.
Communication
Children in this period can have genuine two-way conversations about complex topics. They understand humour, sarcasm, and implication more reliably. They begin to develop their own distinct communication style.
Emotional Development
Emotional regulation is generally more stable than in the younger years, though children of this age still experience strong emotions and need adult support in managing them. Growing awareness of the social context of emotions develops.
Social Development
Friendships become more selective and more durable. Group membership becomes more important. The social dynamics of the peer group can be complex and carry significant weight for the child.
Learning & Thinking
Children develop the ability to study, to manage longer projects, and to draw conclusions from evidence. This is the period when learning styles and preferences become clearer.
Physical Development
Physical coordination and strength develop. Sports and physical games become more rule-governed and competitive. Fine motor skills allow increasingly precise work.
Sleep & Routines
Most children need around 9–11 hours. Sleep is often threatened by evening activities and screen use.
Many children in this stage can manage more of their own lives — homework, some household responsibilities, basic financial literacy, and beginning to navigate public spaces with appropriate supervision.
Peer pressure, internet safety, managing a busier schedule, homework demands, and the beginning of identity negotiation are common challenges.
- Invite conversation without interrogating.
- Show interest in their interests.
- Maintain family connection rituals.
- Respect growing privacy needs.
- Monitor online activity with transparency rather than secret surveillance.
What Matters Most at This Stage
Middle childhood is a good time to build the foundations — communication habits, family connection, values conversations — that will become very important in adolescence.
Preteen
Approximately 10 to 12 yearsThe preteen years represent a transition between childhood and adolescence — children begin to experience puberty, become more intensely peer-focused, and renegotiate aspects of their relationship with caregivers. This stage is often more emotionally intense than middle childhood.
Communication
Preteens can be reluctant to talk with caregivers about what matters to them. Maintaining the relationship, even without detailed disclosure, is the priority. Conversations that happen in parallel with another activity (walking, driving) are often easier than face-to-face.
Emotional Development
Emotional intensity increases in the preteen period, partly due to the beginning of hormonal changes. Mood variability is common. Sensitivity to social evaluation — particularly from peers — grows significantly.
Social Development
The peer group takes on major importance. Belonging to a group, being liked, and navigating the social hierarchy become significant preoccupations. The internet and social media increasingly become part of the social landscape.
Learning & Thinking
Academic demands increase. Study skills, time management, and self-directed learning become more important. The relationship with school can become more complicated.
Physical Development
Puberty begins during this period for many children, though timing varies significantly — particularly for girls, who typically begin slightly earlier than boys. Physical changes can be a source of both excitement and anxiety.
Sleep & Routines
Sleep needs remain high — around 9–11 hours — while the social and technological pressure toward late nights increases. Sleep deprivation is common in this age group.
Preteens increasingly want independence in managing their own time, friendships, and activities. Negotiating this within a safe framework is the key parenting task.
Social media use, peer pressure, sleep deprivation, managing increasing academic demands, and the beginning of romantic feelings are common challenges.
- Stay available without being intrusive.
- Keep conversation channels open.
- Discuss media and social media explicitly.
- Maintain the relationship even when pushed away.
- Set expectations around sleep, screens, and safety — calmly and consistently.
What Matters Most at This Stage
The most important thing at this stage is that the young person knows the relationship with their caregiver is intact and that they can bring difficult things home.
Early Teenager
Approximately 13 to 15 yearsEarly adolescence involves significant neurological restructuring alongside the social, emotional, and physical changes of puberty. This combination accounts for much of what is characteristic about teenage behaviour — emotional intensity, risk-taking, peer focus, and the renegotiation of the parental relationship.
Communication
Teenagers may communicate more easily with peers than with caregivers. Maintaining openness is worth prioritising, even when it seems futile. Avoid turning every conversation into a lesson.
Emotional Development
Emotional responses can be intense and can seem disproportionate to the situation. This partly reflects the brain's development during this period. Teenagers need validation of their emotional experience alongside occasional perspective — in that order.
Social Development
Peer relationships are central to identity and wellbeing in early adolescence. The quality of peer relationships significantly affects mood and functioning. Romantic interest becomes more prominent.
Learning & Thinking
Academic demands increase significantly. The gap between students becomes more visible. Stress around assessment is common.
Physical Development
Puberty continues. Body image becomes a significant preoccupation for many young people in this period. Physical changes and their timing relative to peers matter enormously to teenagers.
Sleep & Routines
Biological changes shift the sleep cycle — teenagers genuinely find it harder to sleep early and wake early. They still need approximately 8–10 hours. Significant sleep deprivation in this group is associated with mood and mental health difficulties.
Teenagers appropriately seek increasing independence in most areas of their lives. The caregiver's role shifts toward negotiation, coaching, and holding a safe framework.
Mental health difficulties become more common and more visible in this period. Identity questions, relationship difficulties, academic pressure, and risky behaviour are all relevant challenges.
- Stay interested without demanding access.
- Know their world — who their friends are, what they're doing online.
- Negotiate rather than only dictate where possible.
- Acknowledge their perspective before responding with yours.
- Maintain expectations with warmth.
What Matters Most at This Stage
The caregiver's most important task at this stage is to remain a safe, non-reactive presence — someone the young person can come back to when things are difficult.
These Descriptions Are General
Every stage described here represents a range, not a fixed point. Many children develop skills earlier or later than the approximate ages given here without this indicating a problem. If you have concerns about your child, contact your GP, paediatrician, or relevant specialist. Age ranges on this page are intended as a guide for understanding, not a diagnostic framework.