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.
All about Natural Swimming Ponds and Pools. Flora and fauna eliminate the need for chlorine while making your swimming oasis a beautiful place to recreate. How they work, design considerations, DIY resources.