Age milestones are significant developmental stages that children typically reach as they grow. These milestones can include physical, cognitive, social, and emotional achievements. For example, by the age of 1, many children can walk independently, while at 2, they often start to speak simple sentences. As children progress through different age ranges, they continue to hit various milestones. By age 5, most children can dress themselves and understand basic rules in games. These milestones help parents and caregivers track a child's development and identify any areas where additional support may be needed.