Children are seen playing in a school playground, and the GP narrator points out Ronnie Brown and Jimmy Grant, both ten years old and weighing 9 stone. She also points out Valerie Smith, aged 11 and weighing 7 stone 12 pounds. The children are seen buying ice creams and sweets after school. The Brown family are seen eating dinner, which consists of pie, cakes, bread and jam and buns. The narrator explains that the Brown family are overweight and take no exercise. They also have an ignorance about what a sensible diet should be. An animation shows the three food groups of protein, carbohydrate and fat, explains that there should be a balance, and what they all do in the body. The animation also shows that vitamins from fruit and vegetables are necessary.