
As children, my brother and sister and I often were assured by my father (a master of deadpan delivery) that a mechanical chicken lived in the attic. The mechanical chicken was the explanation for any unusual noises we heard. It was the reason we could not play in the attic. Can't disturb the mechanical chicken.
(Oddly enough, there was no prohibition on our playing in the basement or the garage, both of which were filled with dangerous tools and household chemicals. Hm.)
Of course, we knew he was kidding. At least, we were pretty sure. Regardless, it was enough to keep me out of the attic for next forty-odd years.
But finally, a couple of months ago we decided to have the attic insulated, get some flooring put in, and install a nice sturdy pull-down ladder. It's still an unfinished space, but now we can store all kinds of stuff in it we can't bear to part with, but don't want underfoot. On top of that, we're setting the thermostate four degrees lower at night, and we're still warm.
On the downside, it was confirmed that no, there is not now, and probably never was, a mechanical chicken.
However, there were a couple of interesting things I never knew were there, sitting patiently in the dark for half a century or more. First, this 18" by 39" pastel painting, here taken out of its ornate (and utterly filthy) gilt frame:

Then, there was this perfectly lovely kerosene lamp, which is back on the main floor of the house now. (Well, on a table, not on the floor as you see here.)

I imagine it might have been used regularly long ago, when my grandparents first moved into this house around 1924. Electrical outlets were fewer and much farther between than today's code requires.
And now, the attic once again holds old furniture and stuff for others to find...but no chickens.