Norm,
First, let me say that you are to complimented on your thoughtfulness and act of kindness. Most commendable to say the least.
I'd like to share a story and I'll be brief. Exploring deeper into and practicing beliefs of my Native American Ancestry, I have learned many lessons from the Elders and Spiritual leaders and most come back to (1) I can only be responsible for myself (2) Continue to live and conduct myself in a "good way" (3) Good things happen to those who are the givers. As negative as most of this was for you, the upside is you were still able to share a gift with the children and that's what mattered. Good people and good acts never unnoticed.
When I get really upset over something like this, I remember a story a Lakota Spiritual Leader from the Rosebud told me. He said he was at a Pow Wow and recorcing some songs. He walked away left his rather expensive recorder, unattended but on and when he returned it was gone. Things like this are not suposed happen at the gatherings. I said, "Why would anyone do that, weren't you mad or upset?" He looked at me and said, " I guess whoever took it, needed much more that I did."
And I agree that there are some "goofs" out there, but there are alot of good kids too. My 12 year old thought what happened was outright cruel. He met the Norm at this past Blowout and could not understand why anyone would do something that mean to someone who is so nice.
Anyhow, you're a good man and good things will come your way.