World Book Online includes all of the articles from the 22-volume print set, plus more than 9,500 pictures and maps, 115 videos and animations, 9,300 sounds, and more than 100 simulated historic Web sites.You can also access World Book Kids, which includes the online version of World Book's award-winning Student Discovery Encyclopedia, dozens of hands-on learning activities correlated to curriculum standards, and thousands of colorful illustrations, diagrams, and maps.