Springfree Trampoline: Keith Alexander & Steve Holmes

April 01, 2019

How I built this

In the late 1980s a New Zealand engineer named Keith Alexander wanted to buy a trampoline for his kids. After his wife said trampolines were too dangerous Keith set out to design his own — a safer trampoline without metal springs. He tinkered with and perfected the design over the course of a dec...See more

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