Season 7 Episodes13
Cast1

Lynne Adams
Narrator (voice)
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Ranked #11 of 13 in Season 7•−0.3 vs season avg
Leather and synthetic panels are cut and assembled into footballs, electronic components are installed in electric-guitar amplifiers, molten glass is formed into marbles, and laminated wood is shaped and balanced into airplane propellers.

Lynne Adams
Narrator (voice)
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"Footballs, Electric Guitar Amplifiers, Marbles, Airplane Propellers" is episode 1 of How It's Made season 7. It scored 7.5/10 from 28 votes, ranking #11 of 13 episodes this season (season average 7.8). It aired on September 5, 2006.