Did You Knock? This book consists of: 1. Karen's OMG Joke Books For Kids - Funny, Silly, Dumb Jokes that Will Make Children Roll on the Floor Laughing 2. Karen's Dad Jokes - The Bad, Funny, Clean And LOL Jokes For The Cool Dad 3. Karen's Knock Knock Jokes For Kids - The Unbreakable Door That No One Ever Got Past 4. Karen's Unicorn Knock Knock Jokes - The Magical Door That Spurts Rainbow Endlessly Filled with hundreds of jokes and knock knock jokes for kids, this book is guaranteed to entertain your children for hours!