Use green paint to paint the pinecone as well as you can. Let it dry completely.
Hot glue (adults only) your pinecone to a wood slice. Take a few cotton balls and carefully stretch them out and glue it around the base of the pinecone tree so it looks like snow.
After the pinecone has dried, start gluing the little pom poms all around the tree.
Cut out a gold glitter star from the foam or paper. Then, glue it to the top of the tree.