Download or read book Optical Illusion Play Pack written by Martin Gardner and published by Sterling Publishing Company, Inc.. This book was released on 2008 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gives kids the opportunity to play with the images. This pack also includes punch-out cards that enhance every illusion, plus a vinyl pouch for safely storing the cards afterwards. It helps children figure out if the two differently shaped tables in a picture are actually the same size, by laying a checkered tablecloth over them both.