The Squirrel Tree has been painted! I also covered the little side building in wooden planks, which will also be painted so they look a little weathered and don't stand out so much. In this photo, I have begun to grass the base, as well as lay stones along the front path.
Internally, I have painted some walls and made a little fireplace. I am not sure I'll keep that wall colour, but I am in love with the little fireplace. It is made from tiny stones which I've superglued together (along with my fingers). A couple of dried out twigs from my garden form the mantlepiece. It isn't glued in position inside the treehouse, so I may change its location yet.