Loading ...A lot of people use Halloween or Carnival costumes to show how excited they are and to express themselves to others. Costumes give an opportunity to learn about different cultures, recent events, and so on. Children who dress up as different people can learn about other people and other cultures outside the classroom. People should be able to dress up as a figure or celebrity they think is respectable and interesting on Halloween. Costumes push for freedom of expression and are not supposed to offend others.