This "v" trellis would be great for cucumbers-squash-green beans.Outdoor Play Spaces - secret spaces--- take the swings down and put lattice up on both sides of the swingset. The side of the A frame could be the entrance.
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.