That sounds like a fun and unique Christmas tree idea! Driftwood can add a rustic and natural look to your tree, making it a perfect choice for those who want to bring a bit of the outdoors inside. To make a driftwood Christmas tree, you'll need some pieces of driftwood, a base to stand the tree on, and some decorations such as ornaments or lights. You can arrange the pieces of driftwood in a tree shape, using smaller pieces for the top and larger ones for the bottom. Then, decorate it however you like!