My son Alex came home Tuesday with a nasty scrape on his arm, an injury he suffered in what he named "the arena"-- a free-form fighting melee that became an after school ritual for several days; I'm happy to say I witnessed the inception of this 4th-5th grade gladiatorial combat zone, and I'm also happy to say that I predicted its demise . . . a teacher finally broke it up, and while it looked like a lot of fun, and boys certainly need to burn off some energy and aggression when they leave school, I'm still glad to see it go -- there were a lot of head-on collisions and body slamming, and the ground wasn't particularly grassy-- there were trees and dirts and roots, and so Alex is probably lucky that he got away with such a minor injury . . . and this confirms one of my lessons about kids: it's always better when you don't watch what they're doing, because most of the stuff they do-- stand on furniture, play on the stairs, whip around sharp objects and bash each other with sticks-- looks incredibly dangerous, but most of the time they don't get hurt, and the only person who suffers is the adult watching all the violent nonsense.