Childhood milestones are key developmental markers that indicate a child's growth and progress in various areas. These milestones typically include physical, cognitive, social, and emotional skills. For example, by the age of one, many children can sit up, crawl, and say simple words like “mama” or “dada.” As children grow, they continue to achieve new milestones, such as walking independently by 12-15 months and forming sentences by age two. Tracking these milestones helps parents and caregivers understand a child's development and identify any potential delays that may require further evaluation or support from professionals like pediatricians or child psychologists.