Elf house on a tree! That would be cute in the garden, especially in the tree over grown with ivy. How about some battery tea lights in the windows during outdoor parties. I hear the fairies/elves whispering "home school project" in my ear.
Christmas – as all holidays – is one of the highest seasons in air travel. Airlines naturally prepare a lot for the holiday season. We can see Santa Claus livery on planes many times, especially on Finair flights as Finland is the official home of Santa.