Why chop the tree down? I'd have frogmarched them back to their parents and told them to stop their kids from trespassing.
We had kids come into our garden a lot (to collect balls etc despite it being a no ball games street) before we got Blu. Funny how a great dane makes kids much more polite - they come to the door and ask first now! And if it happens more than once or twice, their ball becomes Blu's ball!
Bohemian Stud - breeding marked rats for pet/show.