http://www.wikihow.com/Explain-Terrorism-to-a-Young-Child
I would also add that as adults we have a craving for information. We feel knowledge and info makes us smarter and therefore more safe. I certainly think this is true, but if you have young kids, better to limit the non-stop news coverage available on your TV. When kids see their parents distressed, angry and afraid, they can’t help but echo those feelings.
God Bless America.-Jim