Protect the kids!

Short and Sweet, type it out and laminate it. 
Make a bunch, as kids can lose these.  There are many
variations, this is just the "theme." 

FRONT:
Dear Government Agent: I am exercising my right to
remain silent.  Please do not coerce me into answering
your questions. Please call my parents immediately.

BACK:
List Parents Names and ALL contact phone numbers.
List any other person that can "stand in" until parent
can be reached.  List your family attorney and number.