A few minutes ago my 7-year-old daughter called me into the kitchen. She showed me a tiny gray metal disk that she found wedged in the crack of an old wooden hutch that belonged to my mother-in-law. I looked at it with a magnifying glass and then googled "six-pointed star US tiny coin."
It's a silver three-cent piece from 1856.
As you can see, it's in crappy condition, so I'm sure it's not worth more than a buck or two, but my daughter is really excited about her new treasure. She's now looking in every nook and cranny of the hutch with a flashlight, hoping to find more.