Well, I found it. With a level of goofiness that only a kid can muster, I decided one year that red jumper + Santa hat = elf.
My favorite thing about this photo is the crude paper ornaments adorning the tree - oh, and the bookcase made of cinder blocks and boards that was de rigeur in every middle class household of the 1970s. The Christmas tree would shed needles onto the books and we'd keep finding them well into the following year.
Incidentally, this is the least scary this photo has ever been because the magic of Photoshop allowed me to fix the demonic red eyes that I had in this and every other Christmas photo I found.
Tomorrow: A visit to Santa in his cardboard castle.