With choices from ancient days of the medieval era to more recent history such as the 1960's, your child can learn about people and places from another time and place. Although he himself hasn't experienced this history, it is still very fun to learn about vicariously through dressing up in an exciting period appropriate costume.
Since we were small children, each of us has learned in school about the many eras in history that have gone before us. Knowing a little bit about where mankind has been and what he has learned from it, gives each of us a greater understanding about who we are today. History itself will always be one of man's greatest learning tools; besides that, it's fun to learn about the people and times of days gone by. Dressing up in character from eras from other times in history is a fantastic costume idea for many occasions. Your local school or community may celebrate holidays or historic events that are made even more memorable and special through dressing in a historically accurate costume. One of the most fun days of the year that is obviously centered on costumes is that of Halloween. Don't underestimate the potential fun that could be had by dressing up as a unique and special prominent figure from history.