Origins – Yo-Yo
The origins of the Yo-Yo, one of the oldest toys known to humanity, seen on the side of Greek vases 500 BC
Yo-yo - Wikipedia
Did ancient Filipinos really invent the yo-yo? - FlipScience - Top Philippine science news and features for the inquisitive Filipino.
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Out of this World: A Brief History of the Yo-Yo - The Strong National Museum of Play
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Yo-yo - Wikipedia
Yoyo Origin Products
Museum of Yo-Yo History
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Yo-yos Were Not Invented by Ancient Filipino Warriors
Museum of Yo-Yo History
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Out of this World: A Brief History of the Yo-Yo - The Strong National Museum of Play
yo-yo - Wiktionary, the free dictionary
History of the yo-yo — King Community
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Who Invented the Yo-Yo?
