For me, the joy was establishing the tradition of a Mama-made costume, and that it was more about fun than fancy. I started with Simplicity pattern 5720 and tweaked things a bit to create a bear. (Her father doesn't think I quite accomplished that. He describes her costume as 'some sort of cute little animal' and spent the night saying we were 'apparently' the three bears or that we were 'supposed to be' the three bears.) Her costume was finished off by furry boots and a Halloween bib. Mama and Papa Bear were made by basting a belly patch to a brown shirt and improvising ears sewn to headbands.
So, the first of the holiday traditions has been established. Onward in to the holiday season!