The present disclosure relates to a rotary device for external attachment to a vehicle, thereafter being operable for visually attracting attention to all or part of the vehicle, particularly when the vehicle is moving. In the most preferred embodiment, the rotary device attracts the attention of a casual observer via wind-driven rotational motion. In addition to the visual attraction caused by rotational motion, the rotary device can be shaped, decorated and strategically mounted to satisfy the particular attention-getting intent.