stuff u prolly didnt know, n wouldnt need to know:
The word "yo-yo" and the modern yo-yo design come from the Philippines. Unlike the original Chinese and Greek yo-yos, Philippine yo-yos (the word means "come come" or "come back" in the native Tagalog language) had the ability to "sleep." This unique toy may have been an adaptation of the Chinese yo-yo, or it may have developed out of a Philippine hunting weapon. In any case, it dates back at least a few hundred years in the region.
In the 1920s, a Philippine immigrant named Pedro Flores decided to bring this yo-yo design to the United States. He achieved some success right away, and in 1929, he sold his company to a businessman named Donald Duncan. Duncan trademarked the name "yo-yo" and, over the next few decades, built his company up into the premiere yo-yo manufacturer.
Duncan's competitors released similar products, under several different names (including "twirler" and "whirl-a-gig"). But the public adopted the term "yo-yo," leading the rival companies to challenge Duncan's trademark. In 1965, the Federal Court of Appeals ruled that the term had become generic, and so could be used by anyone. In the same year, the Duncan company went bankrupt, selling the Duncan name to the Flambeau Plastics Company, which still sells Duncan-brand yo-yos today.
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school's officially starting today.. tt shld explain things..