You should tell the kids what you saw and give them the option of confessing or having you evince their actions.
It's a much better lesson.
This will do a lot more. If they don't have anything happen and honestly caused a good amount of damage, there is a better chance they will do it again.
If you know the kids or parents you will have a better feel of what needs to be done. Chances are getting the parents involved will make a world of difference. I bet the parents would all get together and pay damages to prevent kids having police/insurance issues. This way business owner is not out money, and kids will stop doing these actions without a criminal record to follow them.