Social and Emotional Milestones in Toddlers: A Parent's Guide

What Social-Emotional Development Covers

Social-emotional development is the broad area that includes how a child connects with others, reads social cues, expresses and manages emotions, and develops a sense of self. It is distinct from language or motor development, but closely intertwined with both.

Key social-emotional milestones in the toddler years include: joint attention (looking back and forth between an object and a person, sharing interest); pointing to show or request things; social referencing (checking a caregiver's face for a reaction before acting); parallel play (playing near but not yet with other children); early empathy (noticing when someone is upset); and beginning self-regulation (calming down after frustration, with help). The CDC's 'Learn the Signs. Act Early.' program tracks these milestones and provides guidance on when to act 1Ref 1Centers for Disease Control and Prevention (2024).Developmental Milestones — Learn the Signs. Act Early. (18 Months and 2 Years).Social-emotional milestones at 12, 18, and 24 months including pointing to share interest, noticing others' emotions, and moving away while checking back with caregiver.

What to Expect at 12, 18, and 24 Months

Around 12 months: Most babies show joint attention — pointing at something to direct a caregiver's gaze, or following someone else's point. The CDC milestone checklist for 12 months includes waving bye-bye and playing simple back-and-forth games. Stranger anxiety at this age is typical, not a problem 1Ref 1Centers for Disease Control and Prevention (2024).Developmental Milestones — Learn the Signs. Act Early. (18 Months and 2 Years).Social-emotional milestones at 12, 18, and 24 months including pointing to share interest, noticing others' emotions, and moving away while checking back with caregiver.

Around 18 months: Toddlers typically move away from caregivers but look to make sure they are nearby; point to show interesting things; and help with simple self-care tasks like pushing arms through sleeves. The CDC lists these as expected 18-month social-emotional milestones 1Ref 1Centers for Disease Control and Prevention (2024).Developmental Milestones — Learn the Signs. Act Early. (18 Months and 2 Years).Social-emotional milestones at 12, 18, and 24 months including pointing to share interest, noticing others' emotions, and moving away while checking back with caregiver. They are beginning to show early empathy — looking concerned if someone cries.

Around 24 months: Most 2-year-olds notice when others are hurt or upset, pausing or looking sad when someone is crying. They engage with books alongside a caregiver, use two-word phrases, and point to body parts when asked 1Ref 1Centers for Disease Control and Prevention (2024).Developmental Milestones — Learn the Signs. Act Early. (18 Months and 2 Years).Social-emotional milestones at 12, 18, and 24 months including pointing to share interest, noticing others' emotions, and moving away while checking back with caregiver. True cooperative play with peers typically comes later, in the 3–4 year range.

Why These Skills Matter Beyond Friendships

Social-emotional development underpins a child's ability to learn in group settings, manage transitions, and develop language. Joint attention, for example, is closely linked to vocabulary growth — a child who is not yet sharing attention with a caregiver has fewer shared reference points for learning word meanings.

Difficulties in this area can also be an early sign of conditions like autism spectrum disorder (ASD) or developmental language disorder, which is why the AAP recommends autism-specific screening at 18 and 24 months alongside broader developmental surveillance at every well-child visit 2Ref 2Lipkin PH, Macias MM; Council on Children with Disabilities, Section on Developmental and Behavioral Pediatrics (2020).Promoting Optimal Development: Identifying Infants and Young Children With Developmental Disorders Through Developmental Surveillance and Screening.AAP red flags for social-emotional delay; autism screening at 18 and 24 months; milestones flagged for prompt evaluation including pointing, two-word phrases, and regression.

When Social-Emotional Skills Are Delayed

A toddler who is not yet pointing by 12 months, not sharing attention by 14–15 months, or not engaging in any back-and-forth play by 18 months may benefit from a closer evaluation. These are not automatic signs of autism or any other specific condition — they can reflect many things, including hearing differences, environmental factors, or temperament — but they are meaningful enough to warrant professional attention.

The AAP flags the following for prompt evaluation: no back-and-forth sharing of sounds, smiles, or facial expressions by 9 months; no babbling by 12 months; no pointing or waving by 12 months; no single words by 16 months; no two-word phrases by 24 months; or any loss of previously acquired skills at any age 2Ref 2Lipkin PH, Macias MM; Council on Children with Disabilities, Section on Developmental and Behavioral Pediatrics (2020).Promoting Optimal Development: Identifying Infants and Young Children With Developmental Disorders Through Developmental Surveillance and Screening.AAP red flags for social-emotional delay; autism screening at 18 and 24 months; milestones flagged for prompt evaluation including pointing, two-word phrases, and regression.

Supporting Social-Emotional Growth at Home

Responsive caregiving — noticing and reacting to a toddler's cues, taking turns in conversation, narrating emotions ('you seem frustrated') — builds the social-emotional foundation. Reading together supports joint attention. Unstructured play with peers gives toddlers a natural setting to observe and eventually engage with others.

Naming emotions consistently helps toddlers build a vocabulary for feelings before they can fully regulate them. Predictable routines reduce the emotional load of transitions, which are often hardest for toddlers because self-regulation is still very much in development.