An accessory for a self-balancing board is provided. The self-balancing board comprises a foot-deck having two lateral foot-deck ends. Each lateral foot-deck end is coupled to a motor that drives a wheel in response to an orientation of the lateral foot-deck end relative to a horizontal plane. The foot-deck has at least one sensor that is triggered when a rider is in a riding position thereon. The accessory includes a chassis, at least one travel surface-contacting element coupled proximal to a first longitudinal end of the chassis to facilitate travel of the chassis over a travel surface, and a seat coupled to the chassis and configured to support the rider. The accessory further includes an engagement structure that releasably engages the self-balancing board and fails to trigger the at least one sensor. At least one sensor-triggering element that is actuatable relative to the engagement structure between a first position is provided, wherein the at least one sensor-triggering element fails to trigger the at least one sensor, and a second position, wherein the at least one sensor-triggering element triggers the at least one sensor. At least one control member is coupled to and actuating at least one of the engagement structure and the at least one sensor-triggering element to control the orientation of the lateral foot-deck ends relative to a horizontal plane.
