Even though Dumbo is Disney's shortest feature-length movie, there are still plenty of secrets to share about this little elephant and his escapades.

1. Like many Disney movies, this one started as a book.

Dumbo the Flying Elephant, written by Helen Aberson and Harold Pearl, started out as a 36-page "Roll-A-Book." The "book" was a series of illustrations on a scroll, and readers would turn a little wheel at the top of the "book" to read the next panel.

2. Dumbo originally had a different sidekick.

The Walt Disney Co.

In the original book, Timothy Q. Mouse didn't exist. Instead, Dumbo’s sidekick was Red Robin. By the end of the book, Red and Dumbo have signed a film contract and are headed to Hollywood.

3. The studio had to keep production cheap.

Due to the war efforts, the studio had instructions to keep Dumbo as inexpensive as possible. As a result, backgrounds are noticeably less detailed than in other Disney movies, and the characters are much simpler. By the end of production, Dumbo had cost just $812,000 to make.

4. Dumbo almost landed the cover of Time.

TIME magazine had plans to honor Dumbo as “Mammal of the Year.” But then Pearl Harbor happened and they opted for a more serious cover, though they still called the animated elephant “Mammal of the Year” in an inside feature.

5. An animator’s strike was parodied in the movie.

There was an extremely heated animator’s strike during production. It's said that Disney mocked his striking workers by putting a scene in where a group of clowns decide to "hit the big boss for a raise." See for yourself:

6. The movie is only 64 minutes long.

At just over an hour, Dumbo is the shortest feature-length Disney movie. Walt was advised to extend the storyline, but he resisted, saying, "You can stretch a story just so far and after that it won't hold together."

7. Harry Truman refused to try the Dumbo ride at Disneyland.

When Harry S. Truman visited Disneyland in 1957, he refused to ride the popular attraction based on the Dumbo movie. It wasn't a fear of heights that stopped him, though; Truman, a Democrat, didn't want to be seen riding in a symbol of the Republican party.

8. Dumbo was Walt Disney’s personal favorite movie.

The Walt Disney Co.

When the movie later aired on the Disneyland TV show, Disney admitted to the audience that Dumbo held a special place in his heart. “From the very start, Dumbo was a happy picture," he said. "We weren’t restricted by any set storyline so we could give our imaginations full play. In other words, if a good idea came to us, we’d put it in the story. It was really a happy picture from beginning to end.”

9. Dumbo II almost happened.

After being named chief creative officer of Walt Disney and Pixar Animation Studios in 2006, one of John Lasseter’s first acts was to quash a proposed sequel that was in the works. The premise: Dumbo and his circus buddies have to figure their way out of the big city after the circus train accidentally leaves them there.

10. A live-action remake is in the works.

Though it was originally announced in 2015, bringing a live-action version of Dumbo to the big screen took a little longer than anticipated. The Tim Burton-directed movie won't be out until later this month, and film execs have hinted that the story will take viewers beyond the original tale.

11. Cels from Dumbo are extremely valuable.

Not knowing that original animation cels would someday be worth a lot of money, artists weren’t too careful with preserving their art. In fact, it was just the opposite: while animators were working on movies like Fantasia and Dumbo, they’d take the finished slippery cels and use them to skate down hallways. Between that and the fact that the earth-toned paints used in the Dumbo color palette were particularly prone to flaking, any remaining cels from the film are among the most valuable of any Disney movie.

12. The song “Baby Mine” was nominated for an Academy Award.

Get your hankies out! The heartbreaking tune, sung while Jumbo the elephant uses her trunk to rock baby Dumbo through the bars of her cage, was nominated for an Oscar but lost to “The Last Time I Saw Paris” from Lady Be Good. The film did win an Oscar for Best Score, however.

13. The “Pink Elephants on Parade” segment is a bit controversial.

Of course it is! It features candy-colored pachyderm hallucinations that are the result of an underage drinker imbibing too much champagne. Though the scene passed muster in 1941, it doesn’t always today. When Dumbo is reformatted for publication, the “Pink Elephant” scene is often replaced with Dumbo dreaming of flying.

14. Dumbo has an octopus named after him.

Thanks to the ear-like fins that protrude from the sides of their heads, these Grimpoteuthis octopods have been dubbed the “Dumbo” octopus. The fins help them swim, of course, not fly.

15. Dumbo did speak—eventually.

Dumbo didn’t utter a single word during the 1941 movie, but by the 1980s the little elephant had grown up and found his voice. When the live-action show Dumbo’s Circus debuted on The Disney Channel more than 40 years after the original movie, Dumbo was suddenly pretty chatty.

16. A tune called "Sing a Song of Cheese" was cut from the film.

Timothy Q. Mouse was once slated to sing an ode to his favorite dairy product. It was axed from the final film, presumably because it didn't actually have anything to do with the plot of the movie.

An earlier version of this article appeared in 2015.