On The Spot

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On The Spot: Inventions, Bad Ideas, The World In Numbers
Inventions, Bad Ideas, The World In Numbers
Season 3  |  Episode 15  |  Discovery Kids  |  March 23, 2015

From uncovering some of the world's best inventions such as the spinning wheel and the first mechanical calculator, to looking at some of the worst ideas given a patent.

From uncovering some of the world's best inventions such as the spinning wheel and the first mechanical calculator, to looking at some of the worst ideas given a patent.

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