Filled with secret codes and invisible ink, this activity collection offers a fun twist on classic puzzles. Kids can wear the red decoder glasses to spot hidden objects and use the UV light pen to detect invisible ink. The variety of activities will keep puzzlers engaged screen-free for hours, with an easily portable format that's perfect for popping in a bag or backpack to take fun on the go! These secret puzzles aren't just entertaining - they help kids improve visual perception and concentration skills. Like all Highlights puzzle books, Secret Puzzle Fun also helps kids improve attention to detail, supports good work habits and builds self-confidence through play. For over 75 years, Highlights has inspired children to become Curious, Creative, Caring and Confident individuals. With products that encourage thinking, creativity and self-expression, Highlights helps kids build essential skills, all while having fun. Pssst...puzzle fans will love this unique collection of secret codes, invisible ink puzzles and more! Secret Puzzle Fun is packed with more than 28 puzzles and games, including Hidden Pictures puzzles, codes puzzles, mazes, criss crosses and riddles. It comes with red decoder glasses and a UV light invisible ink pen that makes solving puzzles even more exciting for kids ages 6 and up. Filled with secret codes and invisible ink, this activity collection offers a fun twist on classic puzzles. Kids can wear the red decoder glasses to spot hidden objects and use the UV light pen to detect invisible ink. The variety of activities will keep puzzlers engaged screen-free for hours, with an easily portable format that's perfect for popping in a bag or backpack to take fun on the go! These secret puzzles aren't just entertaining - they help kids improve visual perception and concentration skills. Like all Highlights puzzle books, Secret Puzzle Fun also helps kids improve attention to detail, supports good work habits and builds self-confidence through play. For over 75 years, Highlights has inspired children to become Curious, Creative, Caring and Confident individuals. With products that encourage thinking, creativity and self-expression, Highlights helps kids build essential skills, all while having fun.