You've seen 'em. Out by apartment house dumpsters.
Here's something fun:
Cover the remaining three sides with reflective film. Fashion a lid out of
whatever. Place the sucker in the breakfast room window and dump bird seed
on the bottom.
Little birdies, not bothered by their own reflection and unable to see you,
will come virtually into your house to have their breakfast while you're
Saw this set up at an Audubon Society sanctuary and thought it would make a
neat week-end project.