In this photograph taken by AP Images for Disney Publishing Worldwide, Mo Willems, a three-time Caldecott Honor winner, shows children and parents how to illustrate their own Pigeon stories in his first-ever app &quot;Don&#x27;t Let the Pigeon Run This App!&quot; produced by Disney Publishing Worldwide, at the Upper West Side Apple Store, Saturday, Oct. 29, 2011, in New York.  (Diane Bondareff/AP Images for Disney Publishing Worldwide)