[Durgical](https://durgical.com/en/) › [DurgiPedia](https://durgical.com/en/durgipedia/) › [Behavioral science](https://durgical.com/en/behavioral-science/) › [Human development across the life span](https://durgical.com/en/behavioral-science/areas/development/) › Milestones from 1 to 3 years

# Milestones from 1 to 3 years

- Life stage

Between 1 and 3 years the child walks, runs and climbs, moves from single words to short conversations and begins pretend play.

Updated Nov 5, 2026

## Key points

- 15 months: takes a few steps alone, says one or two words besides mama or dada, points to ask for something.
- 18 months: walks alone, says three or more words, follows one-step directions without gestures, points to show interest.
- 2 years: runs, kicks a ball, puts two words together, points to two body parts.
- 30 months: about 50 words, two-word phrases with an action word, pretend play, plays next to other children.
- 3 years: conversations with two or more exchanges, asks who, what, where, why; mostly understandable; draws a circle when shown.
- Autism-specific screening at 18 and 24 months; loss of words or social skills is always a red flag.

## What it is

The toddler years bring independent walking, fast vocabulary growth and the start of symbolic play. The ages below follow the CDC 2022 checklists, which list skills that at least 75 % of children show by that age. Language and social communication (pointing to share interest, joint attention, pretend play) are the most informative domains at this age, because their delay is an early sign of hearing loss or autism.

## Key facts

- Pointing to ask (protoimperative) comes before pointing to share interest (protodeclarative); a lack of the second is a classic early sign of autism.
- Play moves from solitary to parallel (next to other children) and then to cooperative play around 3 to 4 years.
- Separation protest peaks in the second year and fades as the child learns that the caregiver comes back.
- Tantrums are common in this period, as autonomy grows faster than language and self-control.

## Milestones from 1 to 3 years (CDC 2022 checklists)

| Age | Motor | Language | Social and cognitive |
| --- | --- | --- | --- |
| 15 months | Takes a few steps alone; feeds self with fingers | One or two words besides mama or dada; points to ask; follows directions with a gesture | Copies other children; shows an object he or she likes; uses objects correctly (cup, phone) |
| 18 months | Walks alone; scribbles; tries a spoon; climbs on and off a chair | Three or more words; follows one-step directions without a gesture | Points to show interest; moves away but checks the caregiver is near; copies chores |
| 2 years | Runs; kicks a ball; walks up a few stairs; eats with a spoon | Two words together; points to two body parts and to pictures | Notices when others are hurt; checks a caregiver's face in new situations |
| 30 months | Jumps with both feet; twists lids; turns pages one at a time | About 50 words; phrases with an action word; uses I, me, we | Pretend play; plays next to and sometimes with others; follows two-step instructions |
| 3 years | Strings beads; puts on loose clothes; uses a fork | Back-and-forth conversation; asks who, what, where, why; says first name; understood most of the time | Joins other children in play; calms within about 10 minutes after the caregiver leaves; draws a circle when shown |

## Clinical notes

- No words by about 15 to 16 months, no two-word phrases by 2 years, or poor understanding of simple directions: test hearing and evaluate language and social communication.
- Not walking by 18 months needs examination of tone, strength and reflexes.
- Any loss of words, eye contact or hand use needs urgent evaluation (autism, Rett syndrome, neurodegenerative disease, hearing loss).

## Memory aid

Steps at 15, words at 18, word pairs at 2, fifty words at two and a half, conversations at 3.

## Test yourself

Think of the answer, then tap the question to see it.

## By what age do most children walk alone on the CDC checklists?

By 18 months; at 15 months they take a few steps on their own.

## Which communication skill at 18 months is most informative for autism screening?

Pointing to show something of interest (sharing attention), not just to ask for it.

## What language skills are expected by 2 years?

Putting at least two words together, pointing to two body parts and to pictures in a book when asked.

## A 2-year-old has stopped saying words he used to say. What is the next step?

Treat it as regression: prompt evaluation, including hearing, developmental and autism assessment, and a neurological examination.

[Add to my cards (4)](https://durgical.app/estudiar/?add=/en/behavioral-science/milestones-from-1-to-3-years/)

## Elsewhere in DurgiPedia

- [Pediatric history: perinatal, growth, development and vaccines](https://durgical.com/en/clinical-exam/pediatric-history-perinatal-growth-development-and-vaccines/)

## Connections

## Related 7

- [Developmental milestones: domains, corrected age and red flags](https://durgical.com/en/behavioral-science/developmental-milestones-domains-corrected-age-and-red-flags/)
- [Milestones of the first year](https://durgical.com/en/behavioral-science/milestones-of-the-first-year/)
- [Milestones from 4 years to school age](https://durgical.com/en/behavioral-science/milestones-from-4-years-to-school-age/)
- [Language development and speech red flags](https://durgical.com/en/behavioral-science/language-development-and-speech-red-flags/)
- [Attachment: Bowlby, Ainsworth and the attachment styles](https://durgical.com/en/behavioral-science/attachment-bowlby-ainsworth-and-the-attachment-styles/)
- [Piaget's stages of cognitive development](https://durgical.com/en/behavioral-science/piaget-s-stages-of-cognitive-development/)
- [Erikson's psychosocial stages](https://durgical.com/en/behavioral-science/erikson-s-psychosocial-stages/)

## Related conditions 3

- [Autism spectrum disorder (ASD)](https://durgical.com/en/conditions/autism-spectrum-disorder/)
- [Hearing loss (conductive and sensorineural, including sudden hearing loss)](https://durgical.com/en/conditions/hearing-loss/)
- [Rett syndrome](https://durgical.com/en/conditions/rett-syndrome/)

[← All of behavioral science](https://durgical.com/en/behavioral-science/)

Educational content on behavior and the clinical relationship; not a diagnostic or treatment guide and no substitute for assessment by a health professional. If you or someone near you is at risk, seek help now from an emergency service or a mental-health helpline.

Sources: [Milestones by 18 Months](https://www.cdc.gov/act-early/milestones/18-months.html) (Centers for Disease Control and Prevention (CDC), 2026); [Milestones by 2 Years](https://www.cdc.gov/act-early/milestones/2-years.html) (Centers for Disease Control and Prevention (CDC), 2026); [Milestones by 30 Months](https://www.cdc.gov/act-early/milestones/30-months.html) (Centers for Disease Control and Prevention (CDC), 2026); [Milestones by 3 Years | Learn the Signs. Act Early. | CDC](https://www.cdc.gov/act-early/milestones/3-years.html) (Centers for Disease Control and Prevention (CDC), 2026).

## **Spotted a mistake?** We are always improving for the community. Tell us what is wrong and our team will review it. Report a mistake

Representative model, for educational purposes only.

---
Source: https://durgical.com/en/behavioral-science/milestones-from-1-to-3-years/
License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Cite as: DurgiPedia (durgical.com), https://durgical.com/en/behavioral-science/milestones-from-1-to-3-years/