Grandmothers are some of life's greatest blessings. They will forever be cherished and their memories will live on forever. Mighty Adventures of Marvin: The Sweetest Love, Grandma's Love, details just a few of Mighty Marvin's greatest moments with his Great-Grandma Red and entails the beautiful relationship he and his grandmother shared. Mighty Marvin continues to treasure the love and lessons she instilled in him.