Those who rest, rust! This is especially true for our brains. This book offers playful memory training with ten-minute exercises for 30 days: imaginative tasks that activate both the gray matter and the laughter muscles. It's memory training and puzzle fun for young and old alike. In short: by bestselling author Ursula Oppolzer. Humboldt Longseller: now in its 14th edition. Entertaining training for memory, knowledge, perception, and creativity.