What American production designer made a directorial effort on a 2003 film based on a Dr. Seuss book?
The Cat in the Hat (film):  It is based on the 1957 Dr. Seuss book "of the same name". Bo Welch: Robert W. "Bo" Welch III (born November 30, 1951) is an American production designer and director.
Robert W. "Bo" Welch III