Puzzle Games Electronic Brain Development Toys,Style: 99111. Puzzle teaching, play math games 2. Sliding board game, built in more than 500 electronic problem bank, divided into 7 difficulty levels, step by step to solve the problem, exercise brain thinking skills 3. Small and portable, can be placed on the desktop to play, can also be held in the hand to play 4. The board magnetic induction, feel light and smooth, the pieces are not easy to scatter 5. Built in timer, 999 seconds to complete the challenge 6.