Most parents focus on the sugar content of cereals, but sodium can be a pretty big issue too, particularly since what the box calls a serving is far less than what most people pour into the bowl. One popular wheat cereal racks up 210 milligrams of sodium in each one-ounce (one-cup) portion. By comparison, an ounce of Quaker rolled oats is sodium-free. It also nets you three grams of filling, cholesterol-lowering soluble fiber. Make it in the microwave and flavor with fresh or dried fruit and nuts.