Brick would also look great for the walkway. Country Casual by Ginkgo Leaf Studio Wisconsin Landscape Contractors Association - 2013 Silver Award for Excellence in Residential Landscape Design and Construction.
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.