Child Development (Young Children)

In the first few years of life, your child’s brain develops more than at any other time with more than one million brain connections formed each second. The quality of your child’s experiences during these early years helps to shape how their brain develops and sets the foundation for learning, how they get along with others, and how they respond to daily stresses and challenges.

Play is a key part of childhood. Play provides a chance to learn and explore the world.  As a parent or caregiver, you can nurture and protect your child as they grow and develop. Through encouragement, support, and access to various activities, you help them achieve key developmental milestones as they progress through different stages of growth. Learning about child development can guide your parenting and help your child reach their potential.

While every developmental stage has milestones, development is not a race. Your child will grow and develop at their own pace. The table below is a general guide for development from ages 2-5. For developmental milestones in infants, please visit Child Development (Infant).


Milestones by 24 months (two years) old (click to expand) »


Milestones by three years old (click to expand) »


Milestones by four years old (click to expand) »


Milestones by five years old (click to expand) »


You know your child best. If your child is not meeting one or more milestones, has lost skills, or if you have concerns, act early and reach out to your local Public Health Nurse or your health-care provider.

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Last updated: 2025-04-01