Elliott, the popular author of Laugh-Out-Loud Jokes for Kids, turns his witty pen to the classic knock-knock joke, providing hours of entertainment for the young and old. Original. nKids cant get enough of laughter--so they cant get enough of Rob Elliots hilarious joke books Knock-Knock Jokes for Kids is an all-new collection of knock-knock jokes that will have kids and kids-at-heart rolling in the aisles. Jokes like n nKnock knock. nWhos there? nBen. nBen who? nBen away for a while but Im back now n nThis new book from Rob Elliott is poised to reach and even surpass the more than 165,000 copies sold of his first book, Laugh-Out-Loud Jokes for Kids.