Children's Sudoku Toys Their Intelligence Development And Logical Thinking Training Features: 1. Truly innovative content that is age-appropriate, skills-oriented and infinitely attractive to young learners. 2. Develop core skills in a fun way. 3. Sudoku is called a smart game to improve children's concentration, logical thinking ability, observation and reaction ability. 4. Simple to difficult, Sudoku puzzle, four gong ge, six Gong Ge, nine gong Ge. 5. Key skills - strategy, problem solving, networking and communication, observation, concentration. 6. Children have fun learning key concepts and are great for bonding with friends, siblings and family. includes: 1 set Sudoku