Dr. Seuss wrote Green Eggs and Ham after his editor bet that he couldn’t write a book using only 50 unique words. For reference, The Cat in the Hat contains 236 unique words. He found the challenge difficult, but he succeeded—the bet was the sole reason he wrote the book, and there was no hidden message in it.

Dr. Seuss’s wife, Helen Palmer, used to hang discarded drafts so he could reread them later and decide if he wanted to use them again—but he rarely did.

The graduating class at Princeton University recited Green Eggs and Ham in its entirety when Dr. Seuss received an honorary degree there in 1985.

“Anywhere” is the only word in Green Eggs and Ham that contains more than one syllable.

The book has inspired many chefs to attempt to create real-life versions of green eggs and ham.

Some have pointed out that Sam-I-Am does not exhibit distinct gender traits and could be interpreted as either male or female.

Green Eggs and Ham was banned in China for allegedly portraying Soviet-style socialism. At the time, China had split from the Soviet Union over de-Stalinization and had taken a hard stance against them and their allies.

He often wrote stories that defied traditional storytelling conventions. Green Eggs and Ham is an example of this, as it is not about an adult teaching a child to try new foods but rather a character convincing another to do so.

Dr. Seuss believed that children’s books could shape young minds toward good or evil. Green Eggs and Ham was the first of his books to deliver a moral lesson to children.