It's National Breakfast Week and to celebrate Kellogg's is giving away free boxes of cereal. According to a nationwide survey conducted by the company, most Americans aren't getting enough fiber in their diets. So to correct the issue, they've launched a new promotion. Head over to kelloggsfamilyrewards.com by Friday and pledge to put more roughage into your body. A limited number of those who do will win free boxes of Raisin Bran or Frosted Mini Wheats, both of which offer 20% of the recommended daily amount of fiber per serving.