Here's our quern, as you might be able to guess, we made it ourselves out of concrete. I wouldn't eat anything from it, but the kids have lots of fun grinding with it! We give them corn and after about 7 passes it's mostly meal. We give them some screens to sift with, but mostly they just keep putting it back in to grind some more.
We also have a little hand mill we let them use. We keep this set very fine or else they run through the corn too quickly. The wooden clicker on the side keeps them from cranking the mill the wrong way and jamming it up.
We also let them try a mortar and pestle. They all want to try it at first, but none of them stick with it too long. It is a lot of work! We have to put some meal in with the corn in the morning, or the first few pounds of the pestle sends everything flying.
Also, here is a picture of our mini stone crane and water wheel for the kids to use.
Matt Tate