In my opinion, sueing the family or calling the cops would not be an option. That's the problem with Amearica today, everyone's sue happy! I would first talk with the parents and kids and tell them what I had in mind as repayment, which would be work, and I mean lots of it! If they diagreed, then I would "get a rope".
As far as the work goes, I would have them clean several hundred acres of mesquite with an ax and spray the roots with diesel and remedy. Then I would have them clean out any fields that might have rocks in them. Pick up the rocks, put in bucket, and haul to edge of field. They could also do other misc chores around the place, such as mowing the yard, trimming tress, clearing out fence lines, etc. After about a year of this labor, we could call it even. And on the last day of work, I would present them with some fireworks. ;-) ;-)