These expertly designed games help you Cross-train your brain in just ten to fifteen minutes a day. With the right exercise program, you can keep your brain young, strong, agile, and adaptable. This book includes 399 games organized on an increasing scale of difficulty from "Warm-up" to "Merciless." The trivia quizzes, brainteasers, and word games are both fun and engaging to play. Plus, they're expertly designed to give your brain the kind of workout that stimulates neurogenesis, the process of rejuvenating the brain by growing new brain cells. The activities in this book are designed to target six key cognitive functions: Long-Term Memory, Working Memory, Executive Functioning, Attention to Detail, Multitasking, and Processing Speed.