What is "julbocken"

Julbocken, with the opening lines "En jul när mor var liten", is a Christmas song written by Alice Tegnér. The song lyrics describe a time when the Christmas goat was still a more popular Christmas giftbringer in Sweden than the Jultomten or Santa Claus. The lyrics describe the goat giving presents, a doll for " mother", who back then was a child and was frightened when the goat jumped, and a drum and a trumpet to mother's brother. When the goat is old, he returns to "mother", who now has children of her own.