S.M.
Every year we give our kids an ornament to open on Christmas Eve to put on the tree that night. The ornament signifies something that has happened that year (a Santa riding a bike might have us remember that this is the year that our child learned how to ride his bike) I've always loved seeing what I would get when I was growing up. Now I have a little plastic tub for each child and a little notebook so they can look back at it too with adding any special comments. Then when they get married :( they can take their ornaments and have them for their tree.
S. (by the way make sure to have the year on the ornament)