Description: Math Toy: Electronic sudoku game, designed to develop your child's thinking, making it an great educational toy for elementary school students3500 Challenge: Our brain teaser toy has Different maths have different colours, you can identify them by maths or by colours, so you can practice maths and coloursDesign: Desktop game sudoku game with lights, when your child places the numbers in the wrong position, a red light will light up at the numbers and a green light will light up at the correct position, simple and easy to playPortable: Educational sudoku puzzle game is small and lightweight, easy to carry and store, suitable for home, travel toys, airplane toys and so onGift: Sudoku puzzle game is an ideal gift for birthdays, holidays or any special occasions, sure to please any child Specification: Material: PP Size Chart: 20cmx14cmx4cm or 7.87inchx5.51inchx1.57inch Package Includes: 1 Sudoku Puzzle Game Note: 1.This is not infant toy , please take away from children to avoid eating.2.Please allow slightly errors 1-2cm differences due to manual measurement. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.