Christmas crackers are a popular holiday tradition, traditionally made with a cardboard tube, paper hats, and a small gift or joke inside. To make your own crackers, start by folding a piece of cardboard in half and cutting it into a tube shape. Next, wrap the tube in colored paper and secure it with tape. You can decorate the outside of the cracker however you'd like. Next, fill the tube with paper hats and small gifts or jokes. Finally, seal the ends of the cracker with ribbon or string. That's it! Your cracker is ready to be pulled open on Christmas Day.