The items which I know have altered are high school bag. In my country, many high schools set a rule that students should take the uniform school bag when they go to school. Therefore, each school will have the same style school bag. Every one can know where the students study when he see their bags. It's probably a good way to control or protect students after they leave from school. However, some high school students don't like to be the same as everyone. They will try to decorate their bags in some ways. For example, they will put some badges which they like on the bags. Besides, They may draw some pictures or icons on the bags. They thinks these decorations will show their personalities and let other people know they are different. Anyway, the decorated bags show the different character of students,