Features: Upgrade logical thinking with 3500+ Sudoku puzzles in this portable electronic game, scientifically improve problem solving efficiency by 40% through systematic math challenges for kids. Features interactive voice guidance and mechanisms that make learning engaging, offering 60% more dynamic educational interaction compared to traditional paper based puzzle books. Designed for children aged 6-12, this ABS plastic educational toy supports cognitive development for home, classroom, or travel environments while ensuring safe play. Ideal for family bonding, preschool STEM activities, or on the go entertainment, its compact storage design reduces cleanup time by 70% compared to conventional board games. This code breaking puzzle game combines educational value with practical portability, featuring organized component storage to maintain tidy play spaces effortlessly. Specifications: Component: Plastic Size: approx.20x14x4cm/7.87x5.51x1.57inch Quantity: 1pc Package Includes: 1x Sudoku Password Learning Machine note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color of the item.