I have a weird sense of humor and was just taking the piss. However, I'm still going to run with the 'its a girl' scenario. I'm also going to take a wild guess that both of her dads are probably in jail.
^ Personally, I'd persue the legal path, if Alkatraz knows of a door - I'd say its worth a shot. Depends how much time you have to ensure they do receive the punishment they deserve. I still struggle to understand what would be going through the minds of these children while the actions stated above took place. Any rational human being wouldnt find that funny. I wouldnt - not when I was 10 years old, not now. They need to be corrected - no respect for the property or health / safety of others.
Anybody can say they are stupid because they are young, but its not. Each person has a set of core values and common sense which obviously these individuals are lacking. To be direct - this is how it starts and the next thing you know, they get a little bit older and can actually pick up rocks that can cause significant damage. Then they will be dropping them off bridges in to car windscreens - etc and to make it all worse, they'll probably think its okay as nobody has ever given them a substantial slap on the wrist for their previous actions.