This question asks about the usual time when children engage in activities. When answering, you can consider children's daily schedules, such as school time, extracurricular activities, family activities, and rest time. Different activity times can be discussed based on the child's age, cultural background, and family habits.

这个问题询问的是孩子们通常在什么时间进行活动。在回答时，可以考虑孩子们的日常生活安排，例如上学时间、课外活动、家庭活动以及休息时间。可以根据孩子的年龄、文化背景和家庭习惯来讨论不同的活动时间。