Don't water your grass it gets brown. Then you water other grass hence the grass is greener on the other side.till you stop watering that grass! Sorry, it's my soap box subject.
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.