"Edwin Olding hacked together a Barbie Power Wheels Ford Mustang chassis with an old go-kart frame and a customized Honda dirt bike engine. This hot pink whip now races at 70 mph. From The Drive:
With the miniature Mustang's tiny electric motor and plastic tires, that would not be an easy task. Instead of trying to boost the Power Wheels' weak performance, Olding decided to chop out everything that wasn't the car's outer shell and drop that onto a pre-built go-kart found on Craigslist. That, however, presented its own problems. The kart's frame couldn't fit into the Mustang's 36-inch wheelbase, so it had to be cut down and welded back together."