In our family, Santa Mouse comes along with Santa. He leaves a present in the tree for each family member. Each is tied with yellow ribbon. The tradition started when my oldest sister read about him in a library book years ago.
The tradition is important to me, and I've introduced it to Andrew's family and some friends. This year, Mom had little wooden sock blockers made, and I told her I'd help her knit socks for them. These became our Santa Mouse gifts.
It ended up that Mom didn't have time to knit the socks, and since I have scrap sock yarn from now until eternity forever and ever amen, I knit them.
It would be fine with me if I never knit another tiny sock again.