Here's a photoset on flickr that tracks some of the interesting changes between the 1963 edition of Richard Scarry's Best Word Book Ever and the 1991 re-issue.
Just one example from the cover: the cat pushing the stroller is now a dad.
The Best Word Book Ever,1963 and 1991, by kokogiak [flickr via waxy]
Buy Scarry's Best Word Book Ever! with as-yet undocumented 1999 revisions on Amazon.
Previously: Judging from this scary Scarry bio, I'd bet the original edition's outtakes are even more hi-larious