Well, the key to making big Christmas ornaments is to use a lot of materials and have a lot of patience. You'll need a large space to work in and plenty of time to get it done. You can use anything from paper mache to wood to create the basic shape of the ornament. Then, you can add decorations like glitter, sequins, or other festive items. With a little creativity and hard work, you can make some really impressive ornaments that will make your Christmas tree shine!