Something a bit more elaborate than this leading up to our moon living room window? I could tie it into the tree-house theme I'm thinking of doing. It could just look like a platform tree house at the top of the "tree".
Artificial cat pheromones like Feliway can often help to soothe tense cats’ frazzled nerves. It replicates the natural pheromones cats release when they’re relaxed and happy. (Think of it as kitty chemical warfare in reverse, or cat heroin)