Knock-Knock Who's there? Rita. Rita who? Rita lot of books? If laughter is the best medicine, the new Little Book - Big Laughs Joke Book Boxed Set proves it. After all, proceeds from the sale of this book go toward funding UnitedHealthcare Children's Foundation's (UHCCF) medical grants for children and their families who need assistance. THREE TIMES THE LAUGHS! This exclusive three-book Little Book - Big Laughs set features all three joke books in UHCCF's Little Book - Big Laughs series! 1.) The original Joke Book filled with 600+ funny knock knock jokes, silly one liners, riddles, tongue twisters & more! 2.) The Riddle Book filled with 500+ tricky riddles 3.) The Knock-Knock Book filled with 350+ humorous Knock-Knock jokes **That's more than 1,450 jokes!** You'll laugh with every page turn, and smile knowing that your purchase helps a great cause. This collection of jokes came from children across the United States looking to help other children in need. The humor will hit the funny bone of everyone - grown-ups and kids alike. UHCCF, above all else, delivers happiness to children and families who need it most. Since 1999, the Foundation has awarded thousands of medical grants, totaling tens of millions of dollars. The sale of this book helps make those grants possible. Little Book - Big Laughs Joke Books were compiled by Meg Cadts, author of the award-winning storybook Oliver & Hope'sTM Series. Order yours today and feel good about supporting UnitedHealthcare Children's Foundation (a 501(c)(3) nonprofit organization). Or make an even bigger difference by ordering several copies to give as gifts. Because everyone enjoys receiving the gift of laughter!