A kitten came to live at our house a couple of weeks ago! Two little girls from the neighborhood rang our doorbell, holding this. Neither of them could keep it, and they didn't know who it belonged to.
I called the vet down the road the next day, and no one had reported a missing kitten, and there were no signs about it.
It's a little boy, and we are calling him Woody. Here's a video of him playing with our older cat, Spite. (I hope it will work here.)