Growing up, there was one Christmas where we had to live at my Grandparents’ house for a few months while we waited to move into our new house. There wasn’t room for a Christmas tree, so my sister and I made one out of paper to hang on the front door. We decorated it with candy. Of course, none of those decorations actually stayed on the tree until Christmas Day.
Still, it's a fond memory and I always think of that paper tree whenever I'm digging the giant artificial tree out of the basement and hoping that this isn't the year the duct-taped box finally gives up and I end up with fake pine branches scattered down those steep and narrow steps.
There are plenty of reasons you may not have a proper Christmas tree this year, either live or artificial. You could have allergies, or your space is simply too small, or last year your cats declared war on anything remotely pine-like and you've learned your lesson. That doesn't mean you can't evoke the spirit of a tree with one of these DIY alternatives.