Children's author Paul Jennings reflects on childhood, success and his writing process

Paul Jennings turns 80 at the end of the month but is still writing and publishing books for young readers. (Supplied)

A 13-word letter from a child was probably the most profound piece of writing ever to land in Paul Jennings' lap. 

"All he said was: 'Dear Paul Jennings, how come you know what it's like to be me?'," the author says.