The document outlines the healthy development of a child from birth to 14 years of age. It describes their development across physical, cognitive, and social/emotional dimensions at different ages. Key milestones include gaining weight and sitting with support at 0-3 months, saying first words and enjoying dropping objects at 12 months, learning to use the toilet and stacking objects at 2 years, distinguishing colors and having long attention spans at 4-5 years, having a small group of friends at school by 6-8 years, and showing increased interest in boys and magazines about sex by 12-14 years.