There are at least two types of play. The first is spontaneous and unconstrained. Examples abound. A child sees a flat stone, picks it up, and sends it skipping across the waters of a pond. An adult realizes with a laugh that he has uttered an unintended pun. Neither Action is Premeditated, and both are at least relatively free of constraint. The second type of play is regulated. There are rules to determine which actions are legitimate and which are not. These rules transform spontaneous play into games, which can thus be defined as rule-bound or regulated play. Leapfrog, chess, “playing house,” and basketball are all games, some with rather simple rules, others governed by a somewhat more complex set of regulations. In fact, the rule books for games such as basketball are hundreds of pages long.