Segway

[Couch Potatoe]

Its looks a lot like a [dolly] (the kind of dolly you use for moving heavy boxes), but with larger wheels. Segways are motorized, designed to transport people in a manner thats [safer] and more environmentally-friendly than that of cars.
Not to be confused with a [segue], of the same pronounciation, which is a transition between two consecutive ideas in a speech or conversation.

[Sonia]

a brand name for an electric vehicle with two wheels. The rider stands on a base between the wheels and holds onto a bar at waist height.

[Sommer]

A motorized personal vehicle consisting of two wheels mounted side by side beneath a platform that the rider stands on while holding on to handlebars, controlled by the way the rider distributes their weight.