Chocolate Fix is one of ThinkFun's most popular stem toys for boys and girls, and is an ASTRA Best Toys For Kids Award winner. It's a sudoku style logic game that comes with 60 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. Chocolate Fix 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, Chocolate Fix is built to develop critical thinking skills. Playing through the increasingly difficult challenges will improve logical reasoning, spatial reasoning and planning skills, all through fun gameplay.