Many animals exhibit play behavior, which has numerous benefits. The complexity of the play behavior is fairly bounded. Maybe that dolphin demonstrated an advan

Many animals exhibit play behavior, which has numerous benefits. The complexity of the play behavior is fairly bounded. Maybe that dolphin demonstrated an advanced form of it relative to other types of animals. The animal section of the Play wiki is interesting, especially the cognitive theories https://en.wikipedia.org/wiki/Play_(activity)?wprov=sfti1 https://en.wikipedia.org/wiki/Play_(activity)?wprov=sfti1