Original: Created by children 's book author\/illustrator Rosemary Wells and based on the world of her Max and Ruby books , the episodes present stories about Max , a rambunctious and determined three-year-old bunny , and his big sister , Ruby , a patient , goal-oriented , sometimes restrictive seven-year-old bunny .
Simplified: It is based on the fictional world of her Max and Ruby books . The episodes show stories about three year old Max , an anthropomorphised toddler bunny , and his big sister , seven year old Ruby , a patient young lady .