So being brand new to the hobby and not having much time to head out, the only places I've searched are my house, my parent's house and my grandparent's house. I've found 4 pennies no older than 1973. But some of the other things I've found have been interesting and funny.
In the image below, you'll see a girl's play watch (my sister's from long ago) and a part of a chain from a swing set. I couldn't tell you if it was one from something my parent's owned from long ago or if it is older than that (we've had the house for almost 28 years, the house is 36 years old.)
Here's a pic (sorry for the bad quality, Blackberry's don't have good lenses on their phones):