Here's a really cool Walt Kelly illustration from the February 18, 1952 issue of LIFE Magazine. It accompanied an abbreviated version of The Glob, a children's story by John O'Reilly.
Kelly is a legendary cartoonist, the creator of the classic comic Pogo. Most of his other drawings in LIFE are pretty small, but you can see more at a blog called Satisfactory Comics, including a nasty Allosaurus. It doesn't look like The Glob became a lasting hit, but you certainly can't blame it on Kelly's drawings. They're killer. It's out of print, but there are some used copies to be had. If you're looking to thrill your kids with an "evolutionary fable," you could do a lot worse.