1. Development of baby\’s cognitive ability At the age of two, the baby\’s cognitive ability is developing rapidly. They begin to understand simple instructions and questions and learn new skills through observation and imitation. In order to promote baby\’s cognitive development, parents can provide a variety of toys and games, such as puzzles, stacked blocks and imitative role-playing. 2. Development of language ability At the age of two, babies have begun to speak and can express their needs. Parents can communicate with their babies