1000 PLAYTHINKS is the most compulsive, head-scratching, and--at 5.08 pounds--gargantuan puzzle book ever. An obsessive collection of 1,000 challenges, puzzles, riddles, illusions-both original as... This description may be from another edition of this product.
Related Subjects
Games Logic & Brain Teasers Math Math Games Mathematics Puzzles Puzzles & Games Science & Math