Theodor Seuss Geisel, known to his fans by his pen name, Dr. Seuss, would have turned 108 years old today. The poet, cartoonist and writer of books for both adults and children found success writing heartwarming, whimsical stories with positive ideological messages. His most popular books remain relevant today and have been adapted into films many times over. Here are the five best videos based on his books available on YouTube.

The Grinch Who Stole Christmas: The 1996 TV special based on Seuss's beloved take on Christmas was directed by Chuck Jones, a friend and former Army buddy of Seuss. The Grinch tells the story of a bitter green monster who steals Christmas from the 'Whos,' but eventually learns the true meaning of the holiday season. The short film is shown on TV every December.

Horton Hears a Who: The 1970 TV special adaptation of the classic book. Also directed by Chuck Jones, it has recieved extremely positive reviews. It follows the the original story of an elephant who discovers an entire civilization living on a speck of dust but struggles to convince the other animals he's not lying, and adds original music and lyrics. I've chosen my favorite song from the movie to post here, but you can watch the entire thing on YouTube (part 1, part 2).

The Cat in the Hat: Check out this animated video of pop star Justin Bieber reading the Seuss classic about a mischievous fun loving cat who rescues two kids from a boring rainy day with his zany antics.

Oh The Places You'll Go: This classic Seuss book, more poem than story, is a popular graduation gift thanks to its uplifting though honest and sometimes dark description of life's adventure. In this video a filmmaker asked the attendees at the arts and music festival Burning Man to read a line each from the book. The final product is a powerful adaptation of Seuss's story.

Green Eggs and Ham: The TV adaptation of this story about a boy who refuses to try a new dish, and not for the obvious reason that the food he is being offered is green, opens with an original piece that might be described as 'The Cat in the Hat' rapping about his love of eggs.

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