Fairy Houses from plastic containers - cover with moss, pebbles, etc. and put them in the garden!I've been looking for something to do with all of the plastic bottles I've been saving! Yay for fairy houses!
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.
If there are muddy patches and paths in, through and around the garden, why not tryout this great idea to make your own beautiful array of many mini stepping stones. All you need is a stepping-stone mold, mortar cement and black dye.