I saw a similar Christmas three at friends. Granny and grandson (my sweet Angel) had strung a lot of leaflets in a spit.
When we have made our leaflet Christmas tree this year, we introduced a small improvement – covered it with a PVA glue and then spread salt on it. The result was awesome. It looked as if the snow has just fallen on it.
A lot of leaflets fill our post boxes, showing us the “best offers”, that we cannot live without:)
We cut them in different sizes. As a base we used several pieces of thick cardboard paper stuck with a glue. When everything is on the spit, shape the whole structure.
Since the tree looked unfinished, the salt idea occurred.
We applied the glue with a brush.
Spread the salt and waited… until the glue dried up. This could take a day or two. After that we shook well the surplus salt and the Christmas tree was ready.