The Go-Kid Quadcoaster is a 4-wheel push vehicle (with a motorized option) created by Houston-area inventor Allen Humphrey. The device appears to incorporate design elements of a beach cruiser bicycle, a go-kart and a standard scooter. The rider stands upright on a metal platform and steers using a pair of handlebars mounted atop a vertical steering column. # Unique four-wheel scooter-like vehicle # Available in push-models or motorized versions # Body is 100% steel # Caliper brakes on push models # Widely spaced wheels provide greater stability than standard scooter # Available in variety of models and sizes # Billed as eco-friendly vehicle # Retail: $299 and up # Nino #* Children's model (ages 2 to 5) includes retro-1950s styling, and safety feature of special speed-restricting bushings # Push model #* Standard full-sized model # Equad #* Motorized edition # Industrial model #* Motorized edition with dual disc brakes, twin 500-watt motors, and a padded seat