To make a Christmas wreath bow, you will need a piece of ribbon, a glue gun, a pair of scissors, and some decorations if you wish to add them. First, measure the size of your wreath and cut the ribbon accordingly. Next, create a loop with the ribbon and hold it in place with your fingers. Use the glue gun to secure the loop in place. Continue making loops until you have a full bow, and then decorate it with any additional decorations you like. Finally, glue the bow to the top of your wreath and enjoy!