Picture-perfect logic puzzles . . . in vibrant two-color! Now, when you're cracking a code to solve a conundrum, you're also creating art. Simply use the numbers around the grid—some in color, some in black—to guide you as you fill in the squares. Gradually an image will emerge, and you'll be rewarded with a completed picture by the end. Not only do these puzzles sharpen logical thinking and cognitive skills, they're tons of fun!