More than 135 puzzles, illusions, and activities in this four-color book, with answer key in the back. Features optical illusions, visual puzzles to challenge l

This book is crammed with puzzles designed to stimulate each of your brain's cognitive functions, keeping it strong and fit. Many different types of puzzles are

A rich assortment of visual mind-bogglers, including "impossible objects" — constructions that look fine on paper but can't possibly exist in reality — as w

Presents a collection of vivid optical illusions, encompassing a wide range of visual tricks and deceptive eye puzzles, from images that appear to move to perpl

An activity book that acts as a companion to the TV series Brain games.