The Cadaco-Ellis game company produced many different types of games during the middle of the twentieth century. The firm especially focused on sports simulation games, usually with a former player's endorsement. Cadaco also produced licensed games from popular literature. In 1957 the firm made Top Scholar, a trivia or knowledge contest game with a booklet full of questions and with answers marked on the playing board. Players place wooden pegs in the answer spaces, checking their scores on a special cardboard "code dial."