Watch the World's Largest Yo-Yo Almost Work

Diameter: 35 inches. Width: 18 inches. Weight: 5.4 pounds. Components: two doggie pools and a dream. Soundtrack: 8bit MGMT cover. Everything's in place for the perfect world's-biggest-yo-yo demonstration. But can it walk the dog?

Actually, not too shabby! Sure, I'd want Chris "Dr. Yo-Yo" Allen's mammoth yo-yo to show off a few more tricks—forward pass, gravity pull, what have you—but to use something this gigantic you'd need, you know, a giant. [Make]

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It needed more weight around the outside circumference. This would've created more rotational inertia to keep it spinning.