Bread class!
I've been teaching four hour bread classes to raise money for my daughter's school and for the food bank, and it's been amazingly fun. For each class we bake a pizza for lunch (with wine and beer if there are adults) and make a few breads. Usually a sourdough, and a couple of others as they request. I just did a class for four middle-school aged girls where we made two soudoughs, pizza, monkey bread and cinnamon rolls -- they were a fantastic group.
Anyway, tons of fun.