Give your brain a workout with perplexing puzzles and games Solving brain teasers is a fun and effective way to exercise your mental acuity at any age. This boo

Designed by three puzzle-book pros and long-time Mensa workers, this super-tricky book is jam packed with almost 100 pages of puzzles--from number stumpers and

What's challenging, fun, and sure to give your brain a workout? This riddle book for kids ages 9-12! Riddle me this—can you solve these super hard word puzzle

FLEX YOUR brain power like never before! From acclaimed author Dr. Gary Gruber, whose proven critical-thinking methods have sold more than seven million books,

Keep kids entertained with this fun-filled activity book with over 150 puzzles, mazes, games, riddles and brain teasers: Wacky Word Puzzles, Amazing Mazes, Bogg