Season 13 Episodes13
Cast1

Lynne Adams
Narrator (voice)
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Ranked #7 of 13 in Season 13•−0.1 vs season avg
Steel heads are forged and fitted with handles to make hammers, cultured milk is processed and aged into Swiss cheese, boots are mounted on wheeled frames to create roller skates, and coloured cores are enclosed in shaped wooden casings to make pencils.

Lynne Adams
Narrator (voice)
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"Hammers, Swiss Cheese, Roller Skates, Coloured Pencils" is episode 1 of How It's Made season 13. It scored 7.4/10 from 23 votes, ranking #7 of 13 episodes this season (season average 7.5). It aired on April 24, 2009.