In conclusion, our results provide evidence that this 12-month multicomponent intervention to prevent obesity in 6–8 y old children was effective in controlling obesity, but not preventing it, specifically targeting those with the highest BMI score. Even though this outcome may seem limited, results from children in control schools show that if no intervention is in place, obesity continues to rise as demonstrated by the school annual census of the nutritional status of children in 1st grade [10].