Valentine Boxes

Why do schools insist on students making Valentine boxes at home? I remember when I was in elementary school we just decorated a white lunch sack and everyone was super excited about what the classmates brought. Now teachers have the students decorate boxes at home and it seems to be a big competition as to who's parent is the most creative. I am not a creative person. I was though happy with the results this year. Julia had a purse, Savannah had a piano and Jack had a baseball field. I didn't get a pictures of Jack's baseball field.