If you want to increase your IQ, prepare for a mental challenge! But you won't dread this workout because working puzzles is a fun and exciting way to whip your brain into shape. And Brain Games: Sharpen Your IQ has a variety of puzzles to choose from to get your mental muscles moving. Inside, you'll find puzzles such as Mind Stretchers, Cube Folds, Knot Problems, Sequences, and Math Puzzles that will help you boost your brainpower and sharpen your IQ at the same time. These two-color puzzles are organized into five levels, starting with a cognitive warm-up in Level 1 then gradually increasing the intensity. So by Level 5, you'll be feeling the burn while gaining some IQ points and you'll still be doing something fun and enjoyable.