Fun & Games Laugh It Up - Give Us a Joke! Why did the Bacon laugh? Because the egg cracked a yolk! From: Eli In: St. Cloud Series & Sequels La Noche De Los Nuevos Magos Author: Mary Pope Osborne, Author: Sal Murdocca, Author: Marcela Brovelli Summary: Jack and Annie visit the Paris World's Fair of 1889 in an effort to protect four scientific pioneers from an evil sorcerer.