What do planets use to download music? Neptunes! What goes zzub zzub? A bee flying backwards! Packed with the silly jokes that kids love, including knock-knocks, tongue twisters, riddles, traditional question-and-answer jokes and more, Just Joking is presented in National Geographic Kids' colorful, photo-driven style. Laughing animals, funny people and other colorful photos are paired with each joke, adding an extra laugh on each page. Paperback, 207 pages. Ages 7 and up.