To make a sea glass Christmas tree, you will need the following materials: sea glass, a Styrofoam cone, hot glue, and a clear plastic cup. First, take your sea glass and arrange it in a pattern on the Styrofoam cone. You can use any pattern you like, but a classic Christmas tree shape works well. Next, use hot glue to secure the sea glass to the Styrofoam cone. Once the glue has dried, use the clear plastic cup to create the base of the tree. Place the Styrofoam cone inside the cup and secure it with hot glue. Finally, add