Most early games fit into the general category of "simulation": Flying games are Flight Simulators, and racing games are Car Simulators. The first Adventure Game, Colossal Cave, started life as little more than a simulation of a Kentucky cave system; even Pong is nothing more than a virtual ping-pong table. But the term Simulation Game usually refers to a genre of program for which the term "game" is really a misnomer: a Simulation Game is really a "toy", by the definitions used by those who study such things academically, more akin to an Erector set than to a chess set. Examples include :