One great approach to discovering history with your kids is to go through the history of food.
I've put together a list of great resource links on the history of British food at my website Best British Food. Right now it focuses on prehistoric food, but I'll be adding more later. Some of these links are fabulous finds - I was really surprised at how much free food history information there is out there. One of the sites is even designed for teaching, but not in the conventional classroom sense. Who knew there was so much to learn about prehistoric food!
Let me know what you think. Have you used food to teach history and culture? It's a favorite at my house.