This document summarizes the debate around McDonald's marketing of Happy Meals to children. It discusses how Happy Meals became popular in 1979 but McDonald's was sued in 2010 for unethical marketing practices targeting children. Critics argue that fast food marketing leads to childhood obesity when the food lacks nutrition. The document examines nutritional information for Happy Meals and McDonald's advertising techniques, as well as questions around whether advertising fast food to children should be illegal or regulated by governments.