Season 14, Episode 13 Retractable Ballpoint Pens, Solar Salt, Tubas

First Aired: March 31, 2010

Tubas; solar salt; retractable ballpoint pens.

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  • Premiered: May 11, 2005
  • Rating: None
  • User Rating:4.65 out of 5 (20 ratings)
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  • Premise: A series that shows how familiar objects used in everyday life are made. (more)

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