Now, a Big Wheel-style bike is available for adults, thanks to the work of a former aerospace engineer.

As a kid, Matt Armbruster dreamed of being an astronaut. As an adult, he got to work on mechanical systems for satellites and planetary spacecraft, including a number of different NASA spacecraft. But today, Armbruster's biggest engineering accomplishment is building low-riding tricycles for adults.

It may not seem quite as noble as building things that expand humanity's understanding of the universe, but Armbruster said the power of these trikes — which look like adult-size versions of the Marx Big Wheel for kids — is something to behold.