My high school English/Journalism teacher, Montserrat Fontes, used to keep a zen garden on her desk in her classroom where she kept a rolled up dollar, out in the open. I guess it was one way she showed her students that she trusted them. I was playing with the idea of doing something similar in the public library where I work to build a feeling of trust with the kids. Then, I remembered, all the kids know where are cars are parked. Good enough.