In the late 1980s, a New Zealand engineer named Keith Alexander wanted to buy a trampoline for his kids. After his wife said they were too dangerous, Keith set out to design his own—a safer trampoline, without metal springs. He tinkered with and perfec...

Springfree Trampoline: Keith Alexander & Steve Holmes (2019)

By NPR Aug 30, 2021 | 12:15 AM
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