It's the mother of all kids' joke books-an all-encompassing, gut-busting, and bestselling collection of more than 1,700 jokes, tongue-twisters, riddles, and puns for all occasions. Here are 61 elephant jokes, including: What did the elephant say when he walked into the post office? / Ouch! Dozens of knock-knock jokes, like: Knock-knock. / Who's there? / Doris. / Doris who? / Doris locked. That's why I knocked! Plus teacher jokes and creature jokes,...