As a boy, his mother soothed him to sleep by chanting rhymes. As he grew older, he started drawing cartoons. Then, he combined those two skills into a book with rhymes and illustrations. That first book, And to Think That I Saw It on Mulberry Street, was rejected 27 times before being published. Wow! Talk about perseverance; after it was published, he didn’t stop. Over the course of his life, he wrote and illustrated 44 children’s books—books like Cat in the Hat and Green Eggs and Ham. His name? You guessed it…Dr. Seuss…whose birthday we celebrate tomorrow. Here's more on what Dr. Seuss can teach us about perseverance.