How to stimulate a child's cognitive development? How can we ensure that their intellectual growth stays ahead? These are the pressing concerns of parents. Developing a child's cognitive abilities and intelligence is a gradual process that requires consistent training. Instead of racking our brains and exerting all efforts to analyze various problems for them, it is better to let children engage in exercises that train their thinking abilities. This approach enhances their interest and promotes the development of their cognitive and thinking skills. Brainstorming Series is a collection of thinking game books integrating numbers, shapes, logic, reasoning, and detective work. This series consists of five books, each arranged according to difficulty level. The books offer rich and enjoyable content, making them suitable for children aged 5 to 12 to effectively help children improve their thinking abilities and make them increasingly intelligent.This book primarily focuses on training numerical thinking abilities, featuring a total of 300 mind games. It presents a series of number-related questions, stimulating children's thinking skills. For better readability, the book includes varying levels of difficulty and time constraints, allowing children to experience a sense of challenge while gradually improving their analytical and thinking abilities.