Sorry to hear that this happened to you. Hopefully the child's family will pay you back for the damages that have been done to your belongings. It seems like you handled this in a real calm and cool manner, I would think most people would blow up at everybody.
What's nice is the kid hasn't dared to show his face around our property since which makes it easy to keep him from playin' with my 6 year old. In fact the neighbors below him (we're good friends) say his mom has had DHS over several times during the past couple weeks, and she's been cleaning (for once) before each of their visits. I've gotta say, pretty happy with the results thus far.
Wow. People are foul these days... maybe you should camp out somewhere close but not at home one day to see if they come along again then dial the police?