There are many interesting things to know about food and cooking. There are many interesting questions to ask and research.
Where does the food we eat come from,
How is it grown or raised, (trees, underground, organic, pesticides used)
what is the nutritional value of different foods,
How should food be stored (refrigerated, covered and sealed),
How to cook food,
How to eat it.(manners and what to combine or not eat it with)
There is a wealth of history, culture, business challenges and politics regarding food. Food can be great discussion and learning.