Hoop rolling, also called hoop trundling, is both a sport and a child's game in which a large hoop is rolled along the ground, generally by means of an object wielded by the player. The aim of the game is to keep the hoop upright for long periods of time, or to do various tricks. Hoop rolling has been documented since antiquity in Africa, Asia and Europe. Played as a target game, it is an ancient tradition widely dispersed among different societies. In Asia, the earliest records date from Ancient China, and in Europe from Ancient Greece. In the West, the most common materials for the equipment have been wood and metal. Wooden hoops, driven with a stick about one foot long, are struck with the centre of the stick in order to ensure good progress. Metal hoops, instead of being struck, can be guided by a metal hook. History A version of hoop rolling played as a target game is encountered as an ancient tradition among aboriginal peoples in many parts of the world. The game, known as hoop-and-pole, is ubiquitous throughout most of Africa. In the Americas, it has been played by a great number of unrelated Native American tribes. The game has exhibited many variations of materials and size of implements and rules of play. It is postulated that its wide distribution is a factor of the rich symbolical possibilities of the game, rather than indicating radial diffusion from a single center of invention. Ancient Greece Ancient Greeks referred to the hoop as the "trochus". Hoop rolling was practiced in the gymnasium, and the prop was also used for tumbling and dance with different techniques. Although a popular form of recreation, hoop rolling was not featured in competition at the major sports festivals. Hoops, also called krikoi, were probably made of bronze, iron, or copper, and were driven with a stick called the "elater". The hoop was sized according to the player, as it had to come up to the level of the chest. Greek vases generally show the elater as a short, straight stick. The sport was regarded as healthful, and was recommended by Hippocrates for strengthening weak constitutions. Even very young children would play with hoops. The hoop thus held symbolic meanings in Greek myth and culture. A bronze hoop was one of the toys of the infant Dionysus, and hoop driving is an attribute