Paint Stick Swords. It was pretty simple but a little time consuming since we were letting the kids wrap their own swords.
Then each child got to create cardboard Shields with their choice of family crest/coat of arms design on them. . I originally was going to explain what each color and shape meant and make it really meaningful but it ended up being a little too busy to get their attention long enough for that. I also had bible verses about the Armor of God for them to go over but that too was also hard to get their attention for.
With all that energy to burn we took them outside for "Knight Training". They did sword fighting, jumping jacks, horseback riding (piggy-back), and of course how could we forget: pool noodle jousting! ;-)