Maddie is outside being active. She uses a special camera to find out how the chain on a bicycle works to turn the wheels and how the front wheel and handlebars are used to steer. Next, Maddie visits a factory to see how rubber, collected from trees, is made into tennis balls using a series of heavy presses. A microscopic camera reveals the special material used to cover the tennis balls with a furry coat.
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Do You Know? - 1x05 Bike Chain and Tennis Ball
- Poor
- Nothing special
- Worth watching
- Pretty cool
- Awesome
- Aired Sep 09, 2016
- Episode 1x05
- Show special No
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- Zanaida is following Do You Know?. Jan 02, 2017
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Zanaida last seen May 16, 2019
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