5 inventions that made average folks millionaires

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Rube Goldberg: Inventions!

A collection of Rube Goldberg's wackiest inventions features more than two thousand schematics from the immensely popular comic for everything from

Rube Goldberg: Inventions!

Eureka!

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Toys!: Amazing Stories Behind Some Great Inventions by Don Wulffson, Laurie Keller, Paperback

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