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.
These are my favorite fairy gnome doors. If you don’t know, gnome doors go on trees and fairy doors go on fairy houses. These are all made by painting rocks and coating them in polyurethane to make them weatherproof.