Babies play with other children, in the sense of truly shared play, at around two and a half to three years old. Before that, they watch them, copy them, play alongside them with their own toys, and sometimes end up snatching a toy out of their hands. This is neither selfishness nor a delay: it is simply the normal order of things. The US developmental milestones (CDC, the US Centers for Disease Control and Prevention) place playing “next to other children and sometimes with them” at 30 months. “Noticing other children and joining them to play” is expected at 3 years. Here is how this skill develops, month by month, and what a parent can do without pushing.
At what age do babies play with other children?
The answer comes in three stages, described since the 1930s by classic research on young children’s play and taken up by today’s developmental guides. First, solitary play, where the child explores alone. Next, parallel play, where two children play side by side, often at the same thing, without really interacting. Finally, associative and then cooperative play, where they interact, organise themselves and pursue a shared goal.
The guide “Les premiers pas de votre enfant” (Toddler’s First Steps), published by the British Columbia health service, places parallel play between 12 and 24 months. It places playing with another child between 24 and 36 months. It adds a useful point: many children are not ready to play with others before the age of 3, or even later. The CDC milestones, reviewed in May 2026, point the same way. At 2 years, the page advises parents to bear in mind that “children this age play next to each other, but don’t know how to share or solve problems”. At 30 months, the milestone expected of most children is: plays next to other children and sometimes plays with them. At 3 years: notices other children and joins them to play. At 4 years: asks to go and play with children if none are around.
These ages are guidelines, not deadlines. The CDC uses milestones reached by at least 75 % of children of the stated age. A two-and-a-half-year-old who still plays alone in the middle of others is therefore perfectly normal.
The stages of social play, from birth to 3 years
Before 1 year: watching, touching, copying
A baby of a few months is interested in other babies as fascinating objects. They stare at them, reach for their faces, grab their hair. At around 9 to 12 months, they begin to copy what another child is doing, banging on a table or shaking a rattle. This imitation is the first bridge towards shared play, as we explain in our article on imitation in babies.
From 12 to 24 months: parallel play
This is the great “side by side” period. Two 18-month-olds put on the same mat will each stack, empty and carry things, without coordinating, but keeping an eye on each other out of the corner of their eye. They copy each other, look at each other, and sometimes laugh together at the same event. There is no “let’s play…” yet: there is “I’m playing, and you’re here”. Squabbles over objects are frequent, because the idea of ownership comes well before the idea of sharing.
From 24 to 36 months: from side by side to playing together
Pretend play opens the door to shared play. When a child can pretend to feed a doll, they can offer the cup to another child, then accept that the other child responds. The first exchanges last a few seconds, then a few minutes. At around 3, children give each other roles, negotiate, argue and start again. Cooperative play, with a shared goal and unspoken rules, tends to settle in between 3 and 4. We describe the timeline of make-believe in our article on pretend play from 18 to 36 months.
Why won’t my baby share their toys?
Because they can’t yet. Sharing means understanding that the other person wants something different from what you want, picturing that the object will come back, and coping with the frustration in the meantime. These three abilities develop between 2 and 4. The CDC says it plainly about 2-year-olds: they don’t know how to share. Demanding sharing at 18 months is asking for a skill that doesn’t exist yet, and the conflict that follows teaches nothing.
What you can do is put it into words. “You wanted the lorry, Lily took it, you’re angry.” Then offer a concrete alternative: another toy, taking turns with a visible cue, or moving on to another activity. The first gestures of comfort towards another child appear during the same period, and we go into them in our article on empathy in children.
What helps babies play with other children
- Regular, short get-togethers with just a few children. One or two familiar children, for an hour, somewhere familiar, are better than a party of ten. Repetition matters more than numbers.
- Toys in pairs. Two buckets, two spades, two lorries: parallel play needs to be able to do the same thing at the same time. The single, coveted toy sparks a squabble, not play.
- Enough floor space. Two toddlers need room to play side by side without getting in each other’s way. A 150 × 200 cm play mat marks out a shared territory where each child has their own corner, and cushions the inevitable bumps.
- An adult who is present but in the background. Stay within earshot, comment now and then, and step in only when a child is in danger or overwhelmed. Directing the play stops children from inventing it.
- Activities that naturally involve several children. Rolling a ball, filling a big tray with sand or water, singing a nursery rhyme with actions, building a tower that everyone knocks down.
- The right not to play. A child who watches for forty minutes before coming closer isn’t shy: they are learning. At this age, playing alone remains a complete activity in its own right, as we explain in babies playing alone.
Nursery, childminders and other children
A child in group childcare sees other children every day, but that doesn’t mean they play “with” them any more before the age when this ability appears. What they gain is getting used to their presence, shared routines, and learning early on about the limits of another person’s body. The biting and hitting of the second year are part of this learning, and we cover them in our article on babies who bite. A child looked after at home, or by a childminder with one or two other children, goes through exactly the same stages, at the same pace. Early socialisation doesn’t speed up the timeline of shared play. The first days in group childcare are described in our article on settling in at nursery.
My child never plays with others: should I be worried?
Before 3, a child who plays alone with other children around is perfectly normal. The signs that warrant talking to your child’s doctor are of a different kind, and the CDC advises not to wait. These concern a child who doesn’t look at other children, doesn’t respond to their name, doesn’t copy anyone or doesn’t point. A loss of skills already acquired also warrants an appointment. At around 3, a child who doesn’t notice other children at all, and shows no interest in them or in pretend play, also deserves a professional opinion. In every other case, patience is the right tool.
Affection, for its part, comes well before shared play: a 15-month-old gives cuddles and kisses long before knowing how to play with a friend, as we describe in babies giving kisses.
Key takeaways
Babies play with other children at around two and a half to three years old. Before that, they watch them, copy them and play alongside them, which is already social play. Sharing isn’t possible at 2, and demanding it teaches nothing. Regular get-togethers with one or two familiar children, toys in pairs, enough floor space and an adult in the background are the conditions that help, without rushing anything.
Sources
- CDC, “Important Milestones: Your Child By Two Years”, “By 30 Months”, “By Three Years”, “By Four Years”, pages reviewed on 16 May 2026.
- HealthLinkBC (Government of British Columbia), “Les premiers pas de votre enfant”, section “Le jeu”, undated.
