Written by Lawrence E. Shapiro, Ph.D. Hidden Rules (or Hidden Curriculum) is a term used to describe the unwritten social rules and behaviors that most of us seem to know without ever being taught, such as respecting those in a position of authority, acknowledging others' personal space, speaking at an appropriate volume, paying attention to body language, and more. This fun card game will help children learn and practice 40 hidden social situation rules for everyday life. The object of play is to be the first player to get rid of all their cards. 2-8 players.