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.
Although summer provides us great time to be outdoor relaxing and entertaining, the glaring sun in the day can be brutal, so we all need a way to get out of the sun so that we can still spend relaxing time outside.