Green Machine

So when I was 7 years-old I lived with my grandparents and they bought me this three-wheeled, awesome pedal machine that you steered with two levers instead of handlebars. You would get going really fast, then crank the levers, which would send you into a 720 spin of mind-blowing proportions (to a 7 year-old). This contraption was called...
"The Green Machine."