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!
Teach Them To Fly: Saying words that begin with W is a lot like making wind with your mouth. Students practice "w" sounds while being the wind, teacher photographs, students add leaves to complete "W is for Wind" project.
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.