num_pages: 64
description: This classic book on optical illusions explores dozens of visual riddles about distance, depth, brightness, contrast, and color. Newly designed and filled with more than eighty illustrations -- plus eight full-color pages of optical illusions -- Now You See It, Now You Don't lets youngsters see for themselves why they can't always believe their eyes!
language: English
title: Now You See It, Now You Don't: The Amazing World of Optical Illusions
titlecomplete: Now You See It, Now You Don't: The Amazing World of Optical Illusions
genres: Science, Nonfiction, Art
ratings_count: 32
publisher: HarperCollins