Try cooking some food in the style of different places and times. You'll find suggestions on the links from the main food page. Then your class or your family can eat it!
Or, try preserving some food the way people did in ancient
Greece or in the Middle
You could make yogurt, or dry fruit (if the weather is nice and there is plenty of sunshine where you are), or salt pork or raisins. You might have a cider-pressing party. You could pickle some cucumbers in brine.
Materials you might want to buy:
Fruit drying screen