A smart way to teach children to think logically and creatively One of the most precious gifts you can offer a child is a sharp mind. The 56 puzzles in this delightful collection were passed down through generations of Chinese families who wanted their children to develop concentration and mental agility. Baifang spent hours enjoying them with her family and friends as she was growing up in the north of China. Now living in San Francisco, Baifang is passing them on to her own children and to families everywhere. Each puzzle inspires clear, precise, and inventive thinking. Some teach math concepts; others involve spatial relationships and visualization. All of them have fascinating solutions and help improve memory and problem-solving skills. An inexhaustible source of challenging fun, these are mental calisthenics for stimulating interaction between lively minds from ages 8 to 80.