An illustrated celebration of human error - covering 19 of the most significantly life-changing or random discoveries: from the invention of firework, potato chips, coffee, post-It notes, or X-Rays. An illustrated celebration of human error - covering 19 of the most significantly life-changing or random discoveries: from the invention of firework, potato chips, coffee, post-It notes, or X-Rays. Serendipity explained to children, with a playful and educational angle.