Rush Hour is one of ThinkFun's most popular stem toys for boys and girls, and has been an international bestseller for over 20 years, with over 10 million units sold worldwide. It's a fun traffic jam logic game that comes with 40 challenges of increasing difficulty, from beginner to expert, and is one of the best gifts you can buy for kids who like smart games and a challenge. Rush Hour is made with high quality components, and comes with a very clear and easy to understand instruction manual - you'll be able to play within minutes of opening the box. Like all of ThinkFun's games, Rush Hour is built to develop critical thinking skills. Playing through the increasingly difficult challenges will improve logical reasoning and critical thinking skills, all through fun gameplay.