Today I posted the answer to the five-minute mystery from last Friday. I did so in the form of a confession from the culprit in which she described her motives and the consequences she faced when she was caught. I also wrote it in what the kids four years ago called "ghost posting". You change the font color to white so that the reader has to highlight the text to see what it says. Discovering how to read the solution was the last part of solving the mystery. Fun day!