J.G.
There is a mess of things you can do. I am just not sure of your budget and preferences.
You can make garden boxes and place them on the roof. Then you just have to squirt them with water. Depending on the room you could replace your window with a greenhouse type window.
I have a gnome I move around my yard that amuses me. Sometimes he stares at the neighbors, not sure if that amuses them. :p