I have a wind chime hanging out on the carport that is made of metal pipes. It's rather heavy so it takes a bit of wind to make it chime. A few times the last week or so I heard it outside my office window so I looked out to see if it was windy and it was Luke, pushing it around with his nose. I laughed at him and tapped on the window, telling him not to play with it because I was afraid he would try to pull it down.
Now I think when he wants my attention he rings it and watches the window. He has done it twice this morning.