Kids can''t get enough of laughter--so they can''t get enough of Rob Elliot''s hilarious joke books! <i>Knock-Knock Jokes for Kids</i> is an all-new collection of knock-knock jokes that will have kids and kids-at-heart rolling in the aisles. Jokes like<br/><br/>Knock knock.<br/>Who''s there?<br/>Ben.<br/>Ben who?<br/>Ben away for a while but I''m back now<br/><br/>With more than 2 million copies sold of his first book, <i>Laugh-Out-Loud Jokes for Kids</i>, it''s clear that kids (and their adults) are looking for clean, lighthearted humor--and Rob Elliott delivers.