Pennants? Banners? Garland? Let's just call it holiday decor
Our two crafting plans were to make folded German paper stars and stitch holiday banners/garlands. I've made those paper stars a million times, and once even held a "how-to" session at my office to teach my coworkers. But try as we might, Maggie and I really struggled and in the end we were doing something wrong. Maggie's excellent at origami—she used to make bouquets of folded flowers for her friends' birthdays—but this task eluded even her.
I wasn't very helpful because I was largely focused on sewing. Maggie's moved into an apartment and will be visiting us for Christmas, so she's decided not to get a tree. I told her she still needs some snippet of festive decor and thought a holiday garland would be easy to put up and simple to store. 
There are umpteen tutorials online for these and I spent a ridiculous amount of time perusing the methods for making them—fused, raw-edged, with interfacing and without, etc. I refused to consider any with templates and finally settled on an amalgam of techniques. I used the cutting instructions from What I Made Today because you could create multiple pennants from a 9" strip of fabric. But I thought they looked a little more finished if I sewed them right sides together, then turned and top-stitched each pennant. I used pre-made double fold seam binding for the "string" and stitched them fairly close together. I was kind of giddy about the results (it takes so little, really, to put me in that state). I thought it might also be cute to clip holiday cards in between the pennants with sweet little clothespins. 