Pedro and the Yo-yo: Man and Myth — Positively Filipino | Online Magazine for Filipinos in the Diaspora
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Yoyo Origin Products
Out of this World: A Brief History of the Yo-Yo - The Strong National Museum of Play
The origin of "Alpha" and "Beta" style yo-yoing - Doc Pop's Toys & Games
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Yo-yo - Wikipedia
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Chinese Culture & the Invention of the Yo-Yo - Synonym
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2018 New arrive TOPYO the ORIGIN YOYO for yoyo professional player Retro ball alloy yo-yo
Yo-yo - Wikipedia
Did ancient Filipinos really invent the yo-yo? - FlipScience - Top Philippine science news and features for the inquisitive Filipino.
Out of this World: A Brief History of the Yo-Yo - The Strong National Museum of Play