The present invention provides a self-propelled device including a spherical housing and an interior driving system. The interior driving system includes one or more motors. The interior driving system acts to provide power to an interior surface of a spherical housing, thereby causing the self-propelled device to move. A biasing component can be provided so that the interior driving system is continuously connected to the interior surface of the spherical housing. An external accessory magnetically interacts with an interior magnetic component through the spherical housing so as to rotate and operate the self-propelled device. The accessory remains the position respect to the top of the self-propelled device.