Springfree Trampoline: Keith Alexander & Steve Holmes 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 decade. But he was daunted by the challenge of bringing his invention to market — and he almost gave up. At that point Steve Holmes, a Canadian businessman, bought the patent to Keith's trampoline, and took a big risk to commercialize it. Today, Springfree Trampoline generates over $50 million in annual sales and has sold over 400,000 trampolines. PLUS in our postscript, "How You Built That," how Cyndi and Chris Hileman created a candle in a planter pot that can later be used to grow wildflowers.
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Springfree Trampoline: Keith Alexander & Steve Holmes

Springfree Trampoline: Keith Alexander & Steve Holmes

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Marcus Marritt for NPR
Engineer Keith Alexander and CEO Steve Holmes of Springfree Trampoline.
Marcus Marritt for NPR

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 perfected the design over the course of a decade. But he was daunted by the challenge of bringing his invention to market — and he almost gave up.

At that point Steve Holmes, a Canadian businessman, bought the patent to Keith's trampoline, and took a big risk to commercialize it.

Today, Springfree Trampoline generates over $50 million in annual sales and has sold over 400,000 trampolines.

How You Built That

How Cyndi and Chris Hileman created a candle in a planter pot that can later be used to grow wildflowers.

How You Built That: The Growing Candle

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Special Series

How I Built This

For all new episodes, go to the How I Built This page on Wondery.com Listen early and ad-free on Wondery+ Listen on Amazon Music