Test your knowledge of the beloved children's author — from Sam-I-Am and Horton to the Grinch and writing trivia. How many can you get right?
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▶ Play this quizTheodor Seuss Geisel adopted his mother's maiden name 'Seuss' as his pen name, adding the 'Dr.' partly as a joke since he never completed his doctorate at Oxford.
The Grinch's heart growing 'three sizes' has become such a cultural touchstone that the phrase is commonly used in everyday language to describe a sudden surge of generosity or kindness.
Sam-I-Am never gives up, offering green eggs and ham in a boat, with a goat, in a box, and with a fox — across 14 different combinations before finally winning over the narrator.
In 'The Sneetches and Other Stories', Sylvester McMonkey McBean profits handsomely from the Sneetches' vanity before they eventually learn that star-bellies don't make anyone superior.
Horton's famous motto of faithfulness pays off at the end of the story when the egg hatches to reveal an elephant-bird — a creature that is part elephant, part bird, rewarding Horton's dedication.
Dick and Jane primers were so ubiquitous in American schools that by the 1950s, an estimated 85% of US schoolchildren learned to read using them.
Springfield, Massachusetts — Dr. Seuss's hometown — later honoured him with a sculpture garden featuring many of his beloved characters.
Geisel enrolled at Lincoln College, Oxford, intending to earn a doctorate in English literature, but left without completing his degree after meeting his future wife Helen Palmer.
King Derwin of Didd also appears in a sequel, Bartholomew and the Oobleck (1949), in which his demand for something new to fall from the sky causes a sticky green substance to rain down on his kingdom.
Green Eggs and Ham went on to become one of the best-selling children's books of all time — not bad for a book born from a bet!
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