I always assumed that at some point I would have to quit making jokes, get a real job and do something meaningful and productive that would actually benefit society. Fortunately this never happened.
A children's biography doesn't have to be comprehensive, and it doesn't have to be definitive. It does have to be accurate, to the extent that's possible. And most of all, it has to be a piece of literature, a compelling read. I want the reader to discover the joy of reading.