Genetics play a big role in making children fat. Many times,the reason why numerous girls and boys gain excessive weight is due to the genes coming from their parents or even their grandparents, proking on them a predisposition to obesity. Since this condition is inherited, there is nothing that parents can really do about it so it makes no sense punishing them. For instance, recent research shows that the reason why 50% of children in the US were above 30 in the BMI scale was because of their specific DNA characteristics.