My little guy grew out of pajama pants that fit. So rather than buy new sweats for winter, I took it as an opportunity to use some of my fabric stash I need to use.
The next two pairs were flannel remnants I had. Flannel isn't as warm as the fleece, but still comfy. I did hem these ones, although they are still too long.
I know lots of people give pajamas on Christmas Eve as a tradition. They are easy if you make them, and while you're cutting one out, it was nice to whip out a whole batch at the same time. You can also embellish with applique, paint stenciling, etc. to further personalize. I thought about putting words across the butt of his pants, as a joke. Like adults who wear words like "juicy" on the bum of their sweatpants. In the end I got lazy and just left them all plain, but maybe I'll go back and add "squishy" or something on his bum.