Begin by laying out the wood slats, one on top of the other, on your work surface. Draw basic triangles (tree shapes) using the ruler and pencil.
Then cut each slat to length (at an angle) using a saw.
Once you cut all the pieces, lay them out on the table to form your three individual trees.
Cut the paper you are using down to 2" wide strips - you'll want enough to cover both sides of all trees.
Mod Podge your Christmas paper into place on both sides of the slats. Let dry completely.
Trim away any excess paper. Give the trees a second and third coat of Mod Podge, letting dry between coats.
Paint the edges of the slats white and let dry. If desired, sand a bit of the edges down.
Stack the pieces together on top of each other and attach with hot glue. You'll twist each piece slightly as you glue it down.
Hot glue each tree to a small scrap wood piece from the scraps as a base for stability.
Place in a large tray and add Christmas embellishments like faux snow, small ornaments, and small packages.