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.
Popsicle sticks are also known as craft sticks, and they are fun to work with. Instead of throwing away your Popsicle sticks after eating ice cream or other frozen treats, recycle them in a variety of craft projects.