That is pretty hard to tell. For one thing, you know, most children wouldn't change their opinions on study, they are not interested in their study at school, apparently, it would be quite hard for them to make the change on this point. That is to say, young children hold the opinion that they dislike study at all. For another, it would be very easy to change their own opinions frequently or periodically on their personal interests. Include the sports, games, or eating habit. You know, children could be mad about hamburgers and computer games the day before, today they might be really into traditional food and sports or even tomorrow they would get rid of all of these. Since their opinions can be easily influenced by their classmates, school teachers or even their parents. They are too young and their general knowledge of this world seems quite limited as well. That is it.