Hello Anne,
I have never done this before, but I do not see why not. For the first couple of years after my two boys were born, I was a stay at home Dad, so I know a little something about cooking with kids.
I find that kids like cooking when they really can get their hands involved, but most of the time their attention span only goes so far. Making doughs, short pastries, cookies, things you can them involved in with out having them pick up sharp objects or get too close to stoves.
When we lived in France my kids went on a boulangerie field trip where the boulangers(bakers) showed the kids the steps for dough(for bread), and then gave them all their own balls of dough to rub and shape. They all got little paper cook's hats, and they loved it. The bakers, baked their doughs, and they took home the bread. Very excited. Plus there isn't much to supervise.
My kids love to use the peelers. Even though they haven't had a problem yet, they can get cut on those things.
I think cooking related classes, or events, for kids, shouldn't be about making a favorite food. But rather teaching them how things are made, and how if they want to, they can take iniative and create something themselves. It's not science, but it's sort of a practical science you can use to teach with. And my kids have fun with it. We cook together everyday, and both have come with me to work, and cooked in the restaurant where I work(on slow nights/days-not a Thursday or Friday night). They are 4 years old.
If you are looking for ideas, and you have an idea of a direction you would like to go in, or need a suggestion, I can help out. If you are looking for some one to do this, I would be interested as well. You can pm me if you like.