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.
Since we& been looking for ways to maximize the use of a small balcony or outdoor area (see here, here and here to catch up) we& run across a lot of the same kinds of ideas: tier plants, keep it clutter free, make sure you have a comfy place to sit, etc
Es werde grün! Geniale Deko-Hacks mit Pflanzen (für die man keinen grünen Daumen braucht)