good role model biographies for coping with challenges/handicaps?

[Guest guest]

Hi all, We are looking for childrens books to read to our 7 y.o. son that center

on the theme of dealing with/overcoming handicaps and challenges. The one we

thought of right away was of course, Helen Keller. We are primarily interested

in nonfiction. Biographies like those of Helen Keller that are geared for K-6

are perfect. Does anyone know of any other books that fit this " type " . We

thought of FDR as well, but his challenge wasnt so much during childhood (he got

polio at age 39) and we also couldnt find any childrens' level book on Temple

Grandin....Any ideas? doesnt necessarily need to be a famous person, either.