Putting on play? Cardboard is a drama teacher, youth theater costumer's best friend. Here's an easy knight's costume. A knight is a popular costume both for Halloween and Catholic All Saints Eve parties, too. For Halloween, the knight may be a character from Dungeons and Dragons, World of Warcraft, Beowulf or King Arthur. At an All Saints party a knight may be St. George or St. Martin of Tours. He might also be the Roman Centurion who helped Jesus and His Mother. Here's a DIY guide to make a suit of armor out of cardboard from your recycle bin. Perfect for any adult or child dragon-slayer. DIY Cardboard Knight Suit of Armor Halloween, All Saints Eve Costume