Simple Optical Illusion Experiments with Everyday Materials

Gr 4-6-Using common household or classroom materials, youngsters can complete more than 50 projects. DiSpezio begins with the scientific explanation of how and why the illusions work and includes general safety rules in handling the materials. Zweifel's line drawings are easy to understand. While there are more glitzy books on the subject, including others by the author, this one is practical and useful.

Cynde Marcengill, Horry County Memorial Library, Surfside Beach, SC

Copyright 2001 Cahners Business Information, Inc.

Gr. 3-6. DiSpezio offers 50 optical tricks to try, and explains the optical and scientific principles that make them work. Sections cover experiments based on motion, distortion, and depth. Some projects are simple constructions of coins, string, or paper; others are quite complicated, requiring lengthy preparation and special items such as colored cells or a motor from a mechanical toy. DiSpezio also includes activities that explore color afterimages and explain natural phenomena, such as why we sometimes see visual floaters. The conversational prose is fairly easy to follow, though some of the scientific explanations are challenging. Black-and-white pencil drawings--often featuring a cutesy frog and porcupine--are not particularly appealing, though they do add to the explanations. Despite the unattractive art, kids will find some easy illusions to amuse and surprise their friends. Includes safety tips. Shelle Rosenfeld
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