It is about a ten-year-old boy named Timmy Turner who has fairy godparents , named Cosmo and Wanda , and a fairy godbrother named Poof . The fairies have the power to grant wishes to Timmy , while still following Da Rules , the fairy rule book . However , Timmy 's immature nature causes him to sometimes ask for wishes that unintentionally result in disaster , and he and his fairy godparents ( and fairy godbrother ) must find a way to `` unwish '' the wish .