A friend's brothers had spent some time studying the era and had made costumes for last Halloween that were as close to the real thing as cardboard and spray paint would allow. They answered questions and showed the kids the different kinds of armor and weapons from the different knights as the other moms and I asked questions from the lesson that included things like; "So what was the Samurai's armor made of?" and "What was the code of conduct that a Knight had to follow to be included in the tournaments?".
...others just looked on for the entertainment, but it was deffinetly a lesson to remember!