A balance board coupled to a two-wheeled vehicle to provide a moving platform that an operator of the vehicle can use to stabilize the vehicle. The balance board includes a coupling mechanism, a frame, one or more moving elements, and one or more foot support pedals. In one example, the balance board is mechanically passive such that the balance board maintains contact with the ground surface without an externally applied force (e.g., by the operator/user of the vehicle). In one aspect, the balance board may be rotatable about multiple rotational degrees of freedom to allow the balance board to steer as the vehicle turns.