The amount of fiber kids need is based on their age. Determine the amount of fiber for kids from three to 18 by adding their age and five for the grams they need per day. So, for a seven year old, it's 12 grams each day. Good sources of fiber include whole grains, fruits and vegetables. Get kids interested in fiber by trying cereals like raisin bran or oatmeal and whole wheat bread.
Kids generally love fresh fruits, baby carrots and celery sticks.