L.B.
Blueberries are very high in fiber and as well as pears. My daughter always gets either blueberries,blackberries,rasberries,strawberries,and or pears at breakfast. That seems to keep her very regular.
Here is a link that lists other high fiber foods that you might want to try. Good luck! http://pediatrics.about.com/od/nutrition/a/0806_high_fibe...