Developmental Checklist by Age

Published: September 3, 2026

36 Months: Back-and-Forth Conversations and Playing with Peers

Around 3 years old, many children start holding real back-and-forth conversations and playing more with other children. Based on CDC developmental milestones, children this age tend to show the following.

Social/Emotional

• Notices other children and joins them to play.
• Calms down within 10 minutes after you leave them, like at a childcare drop-off.

Language/Communication

• Talks with you in back-and-forth conversation using at least two exchanges.
• Asks “who,” “what,” “where,” or “why” questions.

Cognitive (Learning, Thinking, Problem-Solving)

• Draws a circle when you show them how.
• Avoids touching a hot object, like a stove, when you warn them.

Movement/Physical Development

• Strings items together, like large beads or macaroni.
• Puts on some clothes by themselves, like loose pants or a jacket.
• Uses a fork.

Caregiving Tip

Since play with peers increases at this age, creating regular chances to interact with other children at daycare or a playground is considered supportive for social development. As back-and-forth conversation grows, responding to a child’s questions — even briefly — is considered helpful for keeping language development going.

When to Consider Talking with a Pediatrician

If a child doesn’t hold any back-and-forth conversation, shows no interest in other children, or can’t attempt to draw a circle, checking in with a pediatric provider may be helpful. This information isn’t a diagnostic tool and doesn’t replace advice from a medical professional.