Ruth Krauss was an American writer of children's books and theatrical poems for adults. She was the author of such books as The Carrot Seed , Cantilever Rainbow , and I Can Fly . Mary Blair was a prominent concept artist for the Walt Disney Company and worked on such films as Alice in Wonderland , Peter Pan , Song of the South , and Cinderella . Several children's books she illustrated in the 1950s remain in print today, including I Can Fly by Ruth Krauss and Baby's House by Gelolo McHugh. In 1991 she was posthumously inducted into the Disney Legends hall of fame.