Begin by painting all the cardboard tubes brown to resemble tree trunks. Then set them aside to dry completely.
On a sheet of cardstock, draw large triangle shapes (about 7 inches tall) to represent the Christmas trees. Now, cut them out carefully.
Tear or cut the green tissue paper into small squares, around 1 to 2 inches each. Try mixing different shades to create texture and dimension.
Apply glue to the cardstock triangles, then press tissue squares over the entire surface, overlapping the edges slightly until the paper is fully covered.
Once the trees are dry, glue small pom-poms across the “branches” as ornaments. Add a paper star to the top for a festive finish.
Gently glue each triangle onto the rim of a painted tube to form a standing tree. Hold in place for a few seconds until secure.