Amtgard

Taken from their webpage; http://amtgard.com

Amtgard is a non-profit, non-sectarian group devoted to recreating elements of the medieval, ancient, and fantasy genres. The thrust of Amtgard is both recreational and educational, with major group efforts devoted to reconstructions of medieval combat. Amtgard weapons are safe, foam-padded replicas of the real things. Anyone age 14 or greater may join.

(Amtgard differs from Belegarth with their use of lighter Fun Noodle weapons, faster fighting styles, no shield bashing or grappling, and role-playing battle games.)