Living in the Golden State:

Master bedroom window

This is a crystal hanging in the window of the bedroom. By afternoon, it catches sunlight through the window. We've noticed on weekends, when we're home, that this makes most of the cats crazy. Light reflects around the bedroom and they chase it. It's amazing that we can set up a toy that we don't need to manually control, but that still gives the cats some kind of exercise. Gotta love that California sunshine!