1, Possibility and Expectation: McDonald's has adopted various strategies to attract children in its marketing, such as colorful trademarks and attractive toys. These characteristics and expectations can stimulate children's interest and curiosity and make them more willing to choose McDonald's.
2. Psychological pricing: McDonald's products usually have attractive prices and combinations. Mathematically speaking, children may be more likely to associate McDonald's food with enjoyment and happiness, and form positive psychological pricing, making them feel that McDonald's products are particularly worth choosing.
3. Social factors: Children are usually influenced by their peers, and they may be persuaded or recommended by their peers to choose McDonald's as a place for gathering or playing. This social factor can be discussed in mathematical model through network influence model or social communication model. It should be emphasized that these are just some concepts about why children like McDonald's from a mathematical point of view. The actual reasons may be more complicated, involving factors in many fields such as psychology, sociology and marketing. If we want to study this problem in depth, we need to conduct more detailed investigation and data analysis.