A game consisting of a deck of large cards (3.5" by 5.4"), each of which contains an illustrated brain teaser, puzzle or word problem. The conundrums on the cards are designed to develop visual and mental acuity. For example, some cards require the recognition of factual inconsistencies in a picture or the perception of a pattern. Others require the basic application of physics, topology, combinatorics, algebra, geometry and/or logic. Still others require solving an anagram or rebus, or spotting a palindrome. Free-form play is encouraged, but suggested rules are also supplied. Competition can be among single persons or teams. Points are awarded for each correct answer, with bonus questions available. Play to any agreed point score or time limit. For game play, the cards are color-coded to indicate degree of difficulty (easy, medium, hard).