Every child finds their own pace
If you've ever watched another child the same age as yours and wondered whether your kid is "supposed to" be doing that yet, you're in very good company. This guide exists for exactly that moment.
Developmental milestones describe skills that most children develop by a certain age. They're not a strict timetable and certainly not a pass-or-fail test. Children develop in a similar order — sitting before standing, babbling before talking — but the timing varies widely and still falls within a perfectly healthy range.
A few things worth keeping in mind:
- Ranges are wide. What one child does at 12 months another may reach at 18 months, and both can be completely typical.
- Understanding comes before speaking. Children almost always understand more words than they can say. A quiet child is not necessarily a delayed child.
- Development has spurts and plateaus. A temporary pause in one area is not the same as falling behind.
- This is a reference, not a diagnosis. Use it to inform a conversation with your GP or child health nurse — not to label your child's development.
If something here raises a concern, note it and bring it up with a health professional. Parental instinct is genuinely valuable.
12 months
| Speech & language | Motor | Social & emotional | Cognitive |
|---|---|---|---|
| Understands around 10 words; responds to their name; recognises greetings like "hi" and "bye-bye" | Some children stand and take first steps — others won't walk unsupported until 15–18 months, which is normal | Plays alongside other children; hugs familiar people; may show separation anxiety | Cognitive development at this age shows mostly through play and social interaction — see the social/emotional column |
| Babbles and copies sounds; says a few single words; makes eye contact | Holds a crayon and scribbles after being shown; drinks from a cup; uses a spoon | Begins to show empathy — looking sad when someone else is upset; shares excitement with carers | |
| Points at things and looks at you to share interest; follows simple instructions like "give me the block" | Builds small towers, knocks them down; walks holding furniture | Starts very early pretend play — for example, pretending to drink from a cup |
Sources: Raising Children Network (12–15 months); Speech Pathology Australia (12 months milestones)
18 months
| Speech & language | Motor | Social & emotional | Cognitive |
|---|---|---|---|
| Understands up to 50 words and some short phrases; follows simple instructions (e.g., "throw the ball") | Usually walks on their own and begins to run; walks up stairs with help | Separation anxiety often peaks around this age; new emotions emerge: anger, frustration, excitement | Begins imagining through pretend play — holds a toy phone and says "hello" |
| Says 6–20 single words; copies words and noises; names a few body parts; points to pictures in books | Carries larger objects while walking; throws and kicks a ball; scribbles | Starts linking feelings to words (e.g., "sad"); shows affection — gives kisses, hugs dolls | Enjoys spending time near other children even if not playing directly with them |
| Knows their own name and the concept of "mine" | Sits themselves in a small chair; builds small towers |
Sources: Raising Children Network (18–24 months); Speech Pathology Australia (18 months milestones); RACGP/RCH Melbourne
2 years
| Speech & language | Motor | Social & emotional | Cognitive |
|---|---|---|---|
| Follows simple two-part instructions (e.g., "give me the ball and the car"); understands "in" and "on"; responds to simple "what" and "where" questions | Walks up and down stairs holding on; can run; handles small objects; uses a spoon or fork | Separation anxiety usually settles; enjoys spending time alongside other children | Starting to understand time and opposites (big/small, day/night); recognises and names familiar objects |
| Says more than 50 single words; puts two words together (e.g., "bye teddy", "no ball"); uses "I", "you" and "me" | May begin to show a hand preference — this continues to clarify up to age 5 | Starts to understand how their behaviour affects others; tantrums are common | Sorts objects; matches basic shapes and colours; solves simple problems by trying things out |
Sources: Raising Children Network (18–24 months; 2–3 years); Speech Pathology Australia (2 years milestones); RACGP/RCH Melbourne
3 years
| Speech & language | Motor | Social & emotional | Cognitive |
|---|---|---|---|
| Uses sentences of 4–5 words; asks "what", "where" and "who" questions; talks about the past | Runs and falls less; walks up and down stairs on their own; kicks a ball; stands on one foot briefly | Understands "mine" and "yours" — sharing becomes easier; knows the difference between happy, sad, afraid and angry | Asks lots of "why" questions; knows their own age; understands "on", "in", "under"; names some shapes and colours |
| Can be understood by most people most of the time; starts taking turns in short conversations | Jumps on the spot; begins to ride a tricycle | Shows kindness and care; beginning to play cooperatively in small groups | Counts up to 4 objects; sorts by colour and shape; remembers nursery rhymes; starts naming letters and numbers |
Sources: Raising Children Network (2–3 years; 3–4 years); Speech Pathology Australia (3 years milestones); RACGP/RCH Melbourne
4 years
| Speech & language | Motor | Social & emotional | Cognitive |
|---|---|---|---|
| Uses words like "and", "but" and "because" to make longer sentences; describes recent events; answers most questions about daily tasks | Better at running, jumping, hopping and balancing on one foot; draws circles or squares; uses child-safe scissors | Better at managing emotions; shows kindness and empathy; cares about how other people act | Understands opposites; counts to 5; names a few colours; recognises some letters and numbers |
| Uses personal pronouns (he/she, me/you); adults can understand what the child says all the time | Builds towers with blocks; copies some letters; loves crayons and paintbrushes | May enjoy tricking others; starts to cooperate, agree to rules and say sorry |
Sources: Raising Children Network (3–4 years); Speech Pathology Australia (4 years milestones)
5 years
| Speech & language | Motor | Social & emotional | Cognitive |
|---|---|---|---|
| Follows three-part instructions; understands time-related words ("before", "after", "now", "later") | Walks down steps with alternating feet; skips; jumps backwards; throws, catches and kicks a ball | More control over behaviour and emotions; fewer tantrums; seeks out friends and plays cooperatively | Counts to 10; knows letter names (possibly out of order); may remember their home address |
| Uses well-formed sentences; takes turns in longer conversations; tells simple stories with a beginning, middle and end | Cuts with child-safe scissors; does up buttons; writes their first name | Shows empathy — tries to comfort others who are hurt | May know left from right; loves make-believe play |
| May still struggle with the sounds 's', 'r', 'l' and 'th' — this is not a concern on its own |
Sources: Raising Children Network (4–5 years); Speech Pathology Australia (5 years milestones)
When milestone gaps matter
Development is rarely a smooth, linear progression. As clinicians from the Royal Children's Hospital Melbourne, writing for RACGP, have put it: development is "a dynamic, complex process characterised by spurts, plateaus and regression." A snapshot at one moment does not always tell the full story.
Normal variation includes:
- Walking without help anywhere between 12 and 18 months.
- Hand preference becoming clear between 2 and 5 years — consistently favouring one hand before age 2 is worth a mention to your GP, but it's not automatically a concern.
- Understanding far more words than a child can say, especially before age 3.
- Difficulty with 's', 'r', 'l' and 'th' at age 5 — this alone is not a red flag.
Worth raising with your GP or child health nurse:
- Not reaching several milestones across one or more areas at an age where they're typically well established.
- Loss of skills a child previously had — for example, a child who was saying words and then stops. This always warrants a prompt conversation with a health professional.
- Eye contact that seems limited or has decreased.
- Little or no interest in other children or familiar adults by age 2–3.
- A child who is consistently hard to understand well beyond the expected age.
Trust your instinct. Raising Children Network puts it plainly: "If you feel that something isn't quite right with your child's development, trust your instinct and get help early." The evidence backs this up — when parents raise a concern, there is a reasonably high likelihood that a formal review will find something worth addressing. Your concern is data, not overreaction.
Speech Pathology Australia is direct on this point too: don't take a "wait and see" approach when you're worried about a child's communication. Early support, when needed, makes a real difference to outcomes.
For more detail on what to watch for at each age, see our guide on when to seek help.
What to do if you're worried
Noticing a gap between what this guide describes and what your child is doing can feel unsettling. Here is a practical path forward.
Start with your GP or child health nurse. Bring your observations — written notes help. A good clinician will take your concerns seriously, and many areas offer free developmental checks.
Consider an allied-health assessment. Speech pathologists, occupational therapists, and paediatricians all support children's development. You don't always need a referral, though one from your GP may unlock subsidised options.
Not sure where to start? Take the 2-minute quiz and we'll point you toward the most relevant support. Or, if you already know what you need, find a paediatrician or allied-health professional near you.
Getting an early conversation started is always the right move — whether or not your child turns out to need any support at all.