Why Parallel Play Is the Most Important Kind

Infant and Toddler Development  ·  Ages 0 to 3

Why Parallel Play Is the Most Important Kind

What it means when toddlers play beside each other instead of together, and why it is not a social problem

By Dr. Erica Buchholz, PhD  ·  Becoming Playful

Key Points

• Parallel play, where children play near each other without directly interacting, is a normal and healthy developmental stage.
• It is not a sign of shyness, social difficulty, or lack of interest in other children.
• Parallel play is how toddlers learn social skills before they have the neurological capacity for true cooperative play.
• Forcing cooperative play before a child is developmentally ready can increase anxiety and avoidance.
• The presence of another child during parallel play is itself developmentally significant, even without direct interaction.

They Are Playing Next to Each Other. Not With Each Other.

Two toddlers at the same sandpit. Each doing their own thing. Occasionally watching what the other is doing. Not talking. Not sharing. Not taking turns. Just existing in the same space, absorbed in parallel worlds.

If you are watching this and wondering whether something is wrong, whether your child does not know how to play with others, or whether they need more social opportunities, here is what the developmental science says: what you are watching is not a gap in social development. It is social development, doing exactly what it is supposed to do at this age.

The Developmental Stages of Play

Developmental psychologist Mildred Parten published her foundational research on children's play in 1932, identifying a sequence of play stages that remains one of the most cited frameworks in early childhood development. Parten observed that children move through distinct forms of social play as they develop, and that these forms are not simply preferences but reflections of the child's neurological and social-cognitive capacity at each stage (Parten, 1932).

Parten's Play StagesSolitary play comes first, where a child plays entirely alone without reference to other children nearby. Onlooker play follows, where a child watches others play without joining. Parallel play is the next stage, where a child plays beside other children using similar materials but without direct interaction or coordination. Associative play involves more interaction, with children sharing materials and talking, but without a unified goal. Cooperative play, the most socially complex form, involves children working toward a shared goal with assigned roles. Toddlers between one and three years old are developmentally centered in the parallel play stage. This is not a detour. It is the stage (Parten, 1932).

True cooperative play, the kind that requires coordinating intentions, negotiating roles, and sustaining a shared goal, requires theory of mind, language, and executive function capacities that are not yet available to most children under three. Parallel play is the age-appropriate precursor. It allows toddlers to observe, learn, and practice social presence without the cognitive and regulatory demands of full cooperation.

The toddler who plays quietly beside another child is not failing to connect. They are doing the most sophisticated version of connection their nervous system currently supports.

What Children Are Actually Learning During Parallel Play

The developmental significance of parallel play is considerably greater than it appears from the outside. Research on toddler social learning shows that children learn a substantial amount through observation of peers, watching what another child does and incorporating it into their own play, even without direct interaction. This is sometimes called social learning or observational learning, and it operates powerfully in the parallel play context (Bandura, social learning theory, cited widely in developmental literature).

What Proximity Does for the Nervous SystemThe physical presence of another child, even without interaction, provides the toddler's nervous system with social information: the sounds, movements, and energy of another person. Research on social development suggests that this exposure to peer presence in a low-demand context, where no direct interaction is required, helps toddlers gradually build the social comfort and regulatory capacity that cooperative play will eventually require. Parallel play is essentially social practice with the training wheels on (Zero to Three).

Children in parallel play also engage in what researchers call social referencing, briefly checking in with the other child or with a nearby adult to gauge reactions and gather information. These micro-interactions, easy to miss when you are watching for more obvious social exchange, are themselves a form of social engagement and learning.

When Parents Worry About It

The concern about parallel play most often arises when parents compare their toddler to older children, or when they are told by a well-meaning adult that their child should be playing with others more interactively. This comparison is developmentally misplaced. The expectation of cooperative play in a two-year-old is an expectation of a skill set that has not yet had time to develop.

Prompting or pressuring a toddler to interact cooperatively before they are developmentally ready can increase anxiety around peer interactions rather than reducing it. The most supportive thing a parent or caregiver can do is provide regular opportunities for parallel play alongside other children, which builds the social comfort and familiarity that cooperative play will grow from in time.

Action Steps

1Provide regular parallel play opportunities.

Playdates, playgroups, and childcare settings where toddlers are near other children provide exactly the peer exposure that supports the gradual development of social skills. The interaction does not have to be direct to be valuable.

2Resist prompting direct interaction.

"Go play with them" or "Say hi" during parallel play can increase self-consciousness rather than social ease. Letting the interaction emerge naturally when the child is ready produces better outcomes than prompting it.

3Name what you see without evaluation.

"You and Mia are both building with blocks" acknowledges the social context without pressure. It also models the language of social awareness your child is developing.

4Look for the micro-interactions.

The brief glances, the picking up of the same toy, the moment of shared laughter: these are the social interactions of parallel play. They are real and they count, even if they do not look like what adults call playing together.

5Trust the timeline.

Cooperative play emerges from the foundation parallel play builds. The toddler who spends eighteen months playing beside other children is building the social ease that will eventually support playing with them. This is not a slower route to social development. It is the route.

Summary

Parallel play is not a sign that a toddler does not know how to socialize. It is the age-appropriate form of socialization for children between one and three years old. It provides rich opportunities for observational learning, social referencing, and the gradual building of social comfort in peer contexts, all without the cooperative demands that the toddler nervous system is not yet equipped to manage consistently. The child playing quietly beside another child is not missing out on social development. They are in the middle of it.

Frequently Asked Questions

At what age should children start playing cooperatively?

Most children begin showing more associative and cooperative play between ages three and five, as language, theory of mind, and executive function develop enough to support coordinated interaction. The transition is gradual and individual variation is significant.

My two-year-old ignores other children completely. Is that normal?

Yes, particularly for younger toddlers. Solitary and onlooker play are also developmentally normal at this age. If your child is completely unresponsive to peer presence across all contexts, or if you have other developmental concerns, it is worth mentioning to your pediatrician.

Should I be concerned if my three-year-old still prefers parallel play?

Some children move through the play stages more slowly than others, and this is within the range of typical development. If parallel play is the primary mode at four or five, or if there are other social or communication concerns, speaking with your pediatrician is a reasonable step.

How is parallel play different from just ignoring other children?

In parallel play, children are aware of the other child and are often influenced by what the other child is doing, choosing similar materials or activities, social referencing, or briefly interacting. Complete indifference to peer presence is different and worth noting if it is consistent.

Does parallel play count as a playdate?

Yes. A playdate for toddlers does not need to involve cooperative play to be developmentally valuable. Shared space, shared materials, and the social experience of being near another child are all meaningful. Managing your own expectations about what toddler playdates look like makes them much more enjoyable for everyone.

Sources

Parten, M. B. (1932). Social participation among preschool children. Journal of Abnormal and Social Psychology, 27(3), 243-269.

Zero to Three. How young children develop social skills through play. zerotothree.org

American Academy of Pediatrics. Developmental milestones: 2 year olds. healthychildren.org

If you have questions about your toddler's social development or are navigating concerns about how they relate to other children, Dr. Erica works with parents to understand what is typical, what warrants attention, and how to support your child's specific developmental picture. Visit becomingplayful.com.

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