Knock-Knock

Who's there?

Rita.

Rita who?

Rita lot of books?

If laughter is the best medicine, the new Little Book - Big Laughs Knock-Knock Book 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. The third in the series of joke books, this fun-filled book is loaded with more than 350 hilarious knock-knock jokes submitted by kids from across the country. You'll laugh with every page turn, and smile knowing that your purchase helps a great cause.