There is research to suggest that reading books with young children that represent disabilities in positive ways may influence positive attitude development. Here are links to two recent articles: (1) highlights a book list of suggested children's literature (2) shows findings from a study about the impact of sending these books home using a lending library system.
Hello Guita, below is the link to a story book designed specifically with the aim of changing children's attitudes towards disability. Hope this helps. Regards Hemant