The yo-yo enjoyed global popularity for centuries but it was not until 1929, when it was introduced to the United States by businessman Donald F. Duncan, that the modern craze took a grip. It is believed the yo-yo originated in China, but the first mention of it was in Greece in 500 BC. From there it found popularity in the Philippines, India and France. Napoleon and his army were even seen relaxing with their yo-yos before the Battle of Waterloo. In England it became known as the Prince of Wales' toy when the future George IV was painted whirling his yo-yo in 1791. The name yo-yo was a Filipino word for 'come-come' or 'to return'. In the 1920s a man named Pedro Flores took the first Filipino yo-yo to the US and in 1928 began a yo-yo company by the same name in California. Flores' yo-yos, hand carved from a single piece of wood, were unique because the string was not tied to the axle but looped around it, making it capable of numerous tricks. Duncan bought the Pedro Flores company in 1929 and was able to market the yo-yo so that it became a household name and a cultural icon in the 1950s, when the baby-boomers latched on to it. Plastic yo-yos were first made a decade later and by 1962 the Duncan Company alone sold a record 45 million in the US.